"common clay" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1929, Sir Arthur Conan Doyle, When the World Screamed",
          "text": "It is the privilege of the original thinker to put forward ideas which are new and usually unwelcome to the common clay.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The ordinary, run-of-the-mill people."
      ],
      "id": "en-common_clay-en-noun-ZesaixEU",
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        [
          "run-of-the-mill",
          "run-of-the-mill"
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      "tags": [
        "uncountable"
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  "word": "common clay"
}

{
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      "expansion": "common clay (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1929, Sir Arthur Conan Doyle, When the World Screamed",
          "text": "It is the privilege of the original thinker to put forward ideas which are new and usually unwelcome to the common clay.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The ordinary, run-of-the-mill people."
      ],
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        [
          "run-of-the-mill",
          "run-of-the-mill"
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  "word": "common clay"
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