Card game, cheat (4)
I believe the answer is:
crib
This clue is a triple definition!
'card' is the first definition.
(I know that crib is a type of card)
'game' is the second definition.
(crib is a kind of game)
'cheat' is the third definition.
(I know that crib is a kind of cheat)
(Other definitions for crib that I've seen before include "which animals inhabit" , "Cradle - manger" , "Child's cot" , "Pen" , "Bed; manger" .)