Bridge's associate game (7)
I believe the answer is:
pontoon
This clue could be a double definition.
'bridge's' is the first definition.
(pontoon is a type of bridge)
'associate game' is the second definition.
'pontoon' can be an answer for 'game' (I've seen this before). I'm not certain of the 'associate' bit.
Can you help me to learn more?
(Other definitions for pontoon that I've seen before include "Flat-bottomed boat supporting bridge" , "'Flat-bottomed boat, card game and Mayo town (7)'" , "variety of bridge" , "Card game; float" , "Gambling game" .)