Crooner with old game (5)
I believe the answer is:
bingo
'game' is the definition.
(bingo is a game)
'crooner with old' is the wordplay.
'crooner' becomes 'Bing' (Bing Crosby).
'with' says to put letters next to each other.
'old' becomes 'o' (abbreviation).
'bing'+'o'='BINGO'
(Other definitions for bingo that I've seen before include "House!" , "Voila!" , "Game in which "two little ducks" might be called" , "Number-calling game" , "Cry on discovering something" .)