Push for one to press for payment in return (5)
I believe the answer is:
nudge
'push' is the definition.
(I know that nudge is a type of push)
'for one to press for payment in return' is the wordplay.
'for one' becomes 'eg' (both can mean 'for example').
'to press for payment' becomes 'dun' (I've seen this in another clue).
'in return' is a reversal indicator (return can mean to go backwards).
'eg'+'dun'='egdun'
'egdun' reversed gives 'NUDGE'.
(Other definitions for nudge that I've seen before include "Jog" , "Slight push" , "Gentle encouragement" , "Prod gently with elbow" , "---. ---, wink, wink (Monty Python)" .)