Rips off a chest perhaps (6)
I believe the answer is:
cheats
'rips off' is the definition.
('cheat' can be a synonym of 'rip off')
'a chest perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'a'+'chest'='achest'
'achest' with letters rearranged gives 'CHEATS'.
(Other definitions for cheats that I've seen before include "Chaste (anag.)" , "'Tricks, deceives (6)'" , "Chaste kind of swindlers" , "Fixes" , "Doesn't follow the rules of the game" .)