Voucher given to a man (5)
I believe the answer is:
token
'voucher' is the definition.
(I've seen this before)
'given to a man' is the wordplay.
'given' means one lot of letters go next to another.
'a man' becomes 'ken' (short for Kenneth).
'to' next to 'ken' is 'TOKEN'.
(Other definitions for token that I've seen before include "Disc used as money or a gift card" , "Symbolic; voucher" , "Perfunctory" , "Sign - voucher - chip" , "Done for appearance's sake" .)