Person wanting payment cheated, we hear (3)
I believe the answer is:
dun
'person wanting payment' is the definition.
(historical term for a debt collector)
'cheated we hear' is the wordplay.
'cheated' becomes 'done'.
'we hear' shows a homophone (sound like).
'done' is a homophone of 'DUN'.
(Other definitions for dun that I've seen before include "Press for payment" , "nag, for payment" , "Dull brownish-grey colour" , "Brownish gray" , "... to demand payment" .)