Fraudulent deal
I believe the answer is:
scam
'fraudulent deal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for scam that I've seen before include "Con trick" , "'A con, deception (4)'" , "Confidence trick, swindle" , "Fraud, dishonest scheme" , "Fraudulent action" .)