Non-English clubs backed racket (4)
I believe the answer is:
scam
'racket' is the definition.
(racket is a type of scam or scheme)
'non-english clubs backed' is the wordplay.
I cannot really see how this works, but
'clubs' could be 'c' (abbreviation in card games) and 'c' is found in the answer.
The remaining letters 'sam' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for scam that I've seen before include "Screw" , "Swindle (Slang)" , "Fraudulent action" , "Confidence trick, swindle" , "Rip off" .)