work past master (noun) crowning achievement: success story
Sinonime: Meisterstuck, best seller, bull's-eye, chef d'oeuvre,
classic,
coup, crowning accomplishment, crowning stroke, feather in one's cap, grand slam, hole in one, home run, icing on the cake,
masterpiece, masterwork, showpiece, smash hit, work of a master, work of a past master