Card game for four players (6)
I believe the answer is:
bridge
'card game for four players' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bridge that I've seen before include "Captain's place on ship" , "Card game - pontoon - couple" , "''Like a ... over troubled water'' (Simon and Garfunkel)" , "See 14" , "indoor game" .)