Cheat or rascal not working (3,3)
I believe the answer is:
rip off
'cheat' is the definition.
(to rip someone off is to cheat them)
'rascal not working' is the wordplay.
'rascal' becomes 'rip' (I can't justify this - if you can you should give a lot more credence to this answer).
'not working' becomes 'off' (switched off).
'rip'+'off'='RIP-OFF'
'or' is the link.
Can you help me to learn more?
(Other definitions for rip off that I've seen before include "Fraudulent sale" , "Inferior imitation" , "Tear away; overcharge (slang)" , "Modern phrase for swindle or exploitation - that's torn it" , "Daylight robbery (informal)" .)