Break in the game (4)
I believe the answer is:
snap
I believe this clue is a double definition.
'break' is the first definition.
(I know that snap is a type of break)
'game' is the second definition.
(card game)
'in the' acts as a link.
(Other definitions for snap that I've seen before include "Spell of cold weather and card game" , "A walk in the park < to shoot" , "Break sharply like dry twig" , "Still" , "Break - children's card game" .)