Cheat who may be responsible for a bad deal (4,5)
I believe the answer is:
card sharp
'cheat' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for card sharp that I've seen before include "You won't get a good deal out of one" , "one manipulating clubs?" , "Cheat at poker, say" , "Cheating gambler" , "wicked whist whizz?" .)