Voucher given to chap (5)
I believe the answer is:
token
'voucher' is the definition.
(I've seen this before)
'given to chap' is the wordplay.
'given' is a charade indicator (letters next to each other).
'chap' becomes 'ken' (man's name).
'to' put next to 'ken' is 'TOKEN'.
(Other definitions for token that I've seen before include "Emblem" , "Nominal; voucher" , "Indication, symbol or voucher" , "Sign, symbol or an evidence" , "Symbol; metal disc" .)