"home turf" meaning in English

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          "ref": "2020 December 2, Andy Byford talks to Paul Clifton, “I enjoy really big challenges...”, in Rail, page 54:",
          "text": "It's a return to home turf for Byford. He joined London Underground as a graduate trainee in 1989, working his way up to general manager on the Bakerloo, Central and Victoria Lines before heading to director roles at South Eastern Trains and Southern.",
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        "Synonym of home ground."
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          "word": "home ground"
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  "word": "home turf"
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          "ref": "2020 December 2, Andy Byford talks to Paul Clifton, “I enjoy really big challenges...”, in Rail, page 54:",
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          "word": "home ground"
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  "word": "home turf"
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