Boozer's game? (5)
I believe the answer is:
rummy
This clue is a double definition.
'boozer's' is the first definition.
(I've seen this in another clue)
'game?' is the second definition.
(I know that rummy is a type of card game)
(Other definitions for rummy that I've seen before include "Odd; card-game" , "with an alcoholic taste?" , "Set, sequence card game" , "Gin perhaps?" , "game of cards" .)