old hand

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old hand (plural old hands)

1. (idiomatic) A person who is experienced at a certain activity.

   Synonyms: old salt, veteran, warhorse

   My tax advisor is an old hand at dealing with auditors.

   • 2020 March 2, Taki Theodoracopulos, “What makes Bloomie run?”, in The Spectator (US edition)‎^[1]:

     The media, needless to say, are very pro-Bloomberg. He’s an old hand at stroking reporters and television executives, and few of them have raised the fact that it was Rudy who inherited a lawless city with crime out of control and over eight years, via his ‘broken windows’ theory, turned Gotham into the safest big city on the planet.