Fraud (4)
'fraud' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for deceit that I've seen before include "fake" , "Falsehood" , "Fraud, falseness" , "Pretence, cheating" , "Subterfuge" .)
'fraud' is the definition.
(scam is a kind of fraud)
This is all the clue.
(Other definitions for scam that I've seen before include "Swindle, fraud (colloq.)" , "Fraudulent scheme, swindle" , "Con trick" , "A slangy swindle or fraud" , "Fraud, dishonest scheme" .)
(Other definitions for sham that I've seen before include "charade" , "Mash, being false" , "Counterfeit or insincere" , "imitation" , "Phoney sort of hams" .)
'fraud' is the definition.
(a swindle is a fraud or con)
This is all the clue.
(Other definitions for swindle that I've seen before include "Trick" , "skin" , "Bilk" , "Con, defraud" , "Diddle, sting, twist" .)