He demands payment absolutely right with gold (7)
I believe the answer is:
exactor
'he demands payment' is the definition.
(I've seen this before)
'absolutely right with gold' is the wordplay.
'absolutely right' becomes 'exact' (I've seen this before).
'with' says to put letters next to each other.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'exact'+'or'='EXACTOR'
(Other definitions for exactor that I've seen before include "One demanding and obtaining (something from someone)" , "One demands" , "Blackmailer" , "Person squeezing" , "Demanding person" .)