Game individual tucks into out-of-date crackers (3,4)
I believe the answer is:
old maid
'game' is the definition.
(I've seen this before)
'individual tucks into out-of-date crackers' is the wordplay.
'individual' becomes 'i' (Roman numeral for one).
'tucks into' indicates putting letters inside.
'out-of-date' becomes 'old'.
'crackers' becomes 'mad' (I've seen this before).
'old'+'mad'='oldmad'
'i' inserted into 'oldmad' is 'OLD MAID'.
(Other definitions for old maid that I've seen before include "Fusspot; card game" , "Pejorative term for elderly unmarried woman" , "game of cards" , "Spinster - card game" , "Miss" .)