Take back regular payment retaining accountant (6)
I believe the answer is:
recant
'take back' is the definition.
(thesaurus)
'regular payment retaining accountant' is the wordplay.
'regular payment' becomes 'rent' (rent is a kind of regular payment).
'retaining' is an insertion indicator.
'accountant' becomes 'ca' (abbreviation for chartered accountant).
'rent' enclosing 'ca' is 'RECANT'.
(Other definitions for recant that I've seen before include "Withdrawn former statement or belief" , "Publicly withdraw" , "Deny" , "Go back on former belief" , "Renounce (a heretical belief)" .)