"nègre littéraire" meaning in French

{
  "forms": [
    {
      "form": "nègres littéraires",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "nègre littéraire m (plural nègres littéraires)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Occupations",
          "orig": "fr:Occupations",
          "parents": [
            "People",
            "Work",
            "Human",
            "Human activity",
            "All topics",
            "Human behaviour",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "People",
          "orig": "fr:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1892, Jules Renard, L'écornifleur:",
          "text": "Je travaillais, comme toujours, en regardant par l’œil-de-bœuf la danse des flots de la mer. C’est ma petite pénitence de chaque matin. Je l’ai demandée moi-même et la fais scrupuleusement, entière. Il y va de ma réputation de piocheur, de nègre littéraire.",
          "type": "quote"
        }
      ],
      "glosses": [
        "ghostwriter"
      ],
      "id": "en-nègre_littéraire-fr-noun-am8YkL4Q",
      "links": [
        [
          "ghostwriter",
          "ghostwriter"
        ]
      ],
      "raw_glosses": [
        "(now sometimes offensive) ghostwriter"
      ],
      "synonyms": [
        {
          "word": "prête-plume"
        }
      ],
      "tags": [
        "masculine",
        "offensive",
        "sometimes"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/nɛ.ɡʁə li.te.ʁɛʁ/"
    },
    {
      "ipa": "/ne.ɡʁə li.te.ʁɛʁ/"
    },
    {
      "audio": "Fr-Paris--nègre littéraire.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e4/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e4/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg"
    }
  ],
  "word": "nègre littéraire"
}

{
  "forms": [
    {
      "form": "nègres littéraires",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "nègre littéraire m (plural nègres littéraires)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "French offensive terms",
        "French terms with IPA pronunciation",
        "French terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for translations of French quotations",
        "fr:Occupations",
        "fr:People"
      ],
      "examples": [
        {
          "ref": "1892, Jules Renard, L'écornifleur:",
          "text": "Je travaillais, comme toujours, en regardant par l’œil-de-bœuf la danse des flots de la mer. C’est ma petite pénitence de chaque matin. Je l’ai demandée moi-même et la fais scrupuleusement, entière. Il y va de ma réputation de piocheur, de nègre littéraire.",
          "type": "quote"
        }
      ],
      "glosses": [
        "ghostwriter"
      ],
      "links": [
        [
          "ghostwriter",
          "ghostwriter"
        ]
      ],
      "raw_glosses": [
        "(now sometimes offensive) ghostwriter"
      ],
      "synonyms": [
        {
          "word": "prête-plume"
        }
      ],
      "tags": [
        "masculine",
        "offensive",
        "sometimes"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/nɛ.ɡʁə li.te.ʁɛʁ/"
    },
    {
      "ipa": "/ne.ɡʁə li.te.ʁɛʁ/"
    },
    {
      "audio": "Fr-Paris--nègre littéraire.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e4/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e4/Fr-Paris--n%C3%A8gre_litt%C3%A9raire.ogg"
    }
  ],
  "word": "nègre littéraire"
}