Con job
There are a few possibilities for this:
'con job' 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 "Fraud, dishonest scheme" , "Swindle (sl.)" , "Fraud, trick (slang)" , "ploy" , "A slangy swindle or fraud" .)
'con job' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sham that I've seen before include "Phoney kind of hams" , "charade" , "Not what it seems to be" , "Pretence, hoax" , "Mash, being counterfeit" .)
'con job' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ruse that I've seen before include "Trick designed to deceive" , "Clever stratagem or plan" , "Cunning scheme" , "Trick, stratagem" , "Deceptive manoeuvre" .)