It's a handy game (5)

I believe the answer is:

whist

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'game' is the definition.
(whist is a card game)

I don't understand how the rest of the clue works.

(Other definitions for whist that I've seen before include "Card-game" , "Trick-taking card game" , "Demand silence" , "Tricky card game" , "Card game, often played at a "drive"" .)

I've seen this clue in the Evening Standard.

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