Revolutionary for one to request payment hint (5)
I believe the answer is:
nudge
'hint' is the definition.
(thesaurus)
'revolutionary for one to request payment' is the wordplay.
'revolutionary' says the letters should be written in reverse (letters revolve around).
'for one' becomes 'eg' (both can mean 'for example').
'to request payment' becomes 'dun' (I've seen this in another clue).
'eg'+'dun'='egdun'
'egdun' reversed gives 'NUDGE'.
(Other definitions for nudge that I've seen before include "Remind, prompt gently" , "Give a reminder" , "Dig with elbow" , "Encouraging prompt" , "Festive entertainment" .)