Small room for game (3)
I believe the answer is:
loo
This clue is a double definition.
'small room' is the first definition.
'game' is the second definition.
(historic card game found in Jane Austen novels)
'for' is the link.
(Other definitions for loo that I've seen before include "Toilet (informal)" , "Card game; the 'smallest room'" , "The little room - card game" , "Card-game" , "Lavatory - old card game" .)