Card player leaving feast cut turkey (4)
I believe the answer is:
flop
'turkey' is the definition.
(thesaurus)
'card player leaving feast cut' is the wordplay.
'card player' becomes 'east' (bridge players are known by compass position).
'leaving' is a deletion indicator.
'cut' becomes 'lop' (lopping is a kind of cutting**).
'feast' with 'east' removed is 'f'.
'f'+'lop'='FLOP'
(Other definitions for flop that I've seen before include "Fail" , "Complete failure" , "crash" , "Collapse loosely - total failure" , "Utter failure" .)