It's used in snooker game (6)

I believe the answer is:

bridge

This clue is a double definition.

'it's used in snooker' is the first definition.
(hand position that support the cue)

'game' is the second definition.
(card game)

(Other definitions for bridge that I've seen before include "Card-game" , "Card game; structure" , "See 14" , "Pontoon is one" , "Crossing structure" .)

I've seen this clue in The Everyman puzzle in The Observer.

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