Odd sort of game (5)
I believe the answer is:
rummy
This clue is a double definition.
'odd' is the first definition.
(I know that odd can be written as rummy)
'sort of 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 "Peculiar - card game" , "Odd; card-game" , "Card game; strange; like a spirit" , "Gin perhaps?" , "Two-pack card game" .)