Coupon given to fellow (5)
I believe the answer is:
token
'coupon' is the definition.
(thesaurus)
'given to fellow' is the wordplay.
'given' is a charade indicator (letters next to each other).
'fellow' becomes 'ken' (I can't justify this - if you can you should believe this answer much more).
'to' next to 'ken' is 'TOKEN'.
Can you help me to learn more?
(Other definitions for token that I've seen before include "signal" , "Done for appearance's sake" , "Sign, maybe substitute for the real thing" , "empty gesture?" , "Gift voucher - symbol" .)