Start to see cash and monetary fraud (4)
I believe the answer is:
scam
'fraud' is the definition.
(I know that scam is a type of cheat)
'start to see cash and monetary' is the wordplay.
'start to' indicates taking the first letters.
The initial letters of 'see cash and monetary' is 'SCAM'.
(Other definitions for scam that I've seen before include "Confidence trick, swindle" , "ploy" , "Racket" , "Rip off" , "'A con, deception (4)'" .)