Pirate's card game (4)
I believe the answer is:
crib
I believe this clue is a double definition.
'pirate's' is the first definition.
(I've seen this before)
'card game' is the second definition.
(crib is a kind of card game)
(Other definitions for crib that I've seen before include "Nativity centrepiece" , "Cot; translation cheat" , "Translation; bed" , "Child's cot" , "Manger; illegally copy" .)