Card game, type of bridge (7)
I believe the answer is:
pontoon
This clue is a double definition.
'card game' is the first definition.
(I've seen this before)
'type of bridge' is the second definition.
(I've seen this before)
(Other definitions for pontoon that I've seen before include "Lighter" , "Gambling game" , "Blackjack" , "Floating bridge support" , "Bridge of boats" .)