Fraud involving computers being recalled (4)
I believe the answer is:
scam
'fraud' is the definition.
(I know that scam is a type of cheat)
'computers being recalled' is the wordplay.
'computers' becomes 'Macs' (Apple Macs).
'being recalled' says the letters should be written backwards (to recall can mean to bring something back).
'macs' reversed gives 'SCAM'.
'involving' acts as a link.
(Other definitions for scam that I've seen before include "Rip-off" , "An informal swindle" , "Fraudulent business scheme" , "Racket" , "A slangy swindle or fraud" .)