Arrange putting value on gold coffer (11)
I believe the answer is:
orchestrate
'arrange' is the definition.
(thesaurus)
'value on gold coffer' is the wordplay.
'value' becomes 'rate' ('rate' can be a synonym of 'value').
'on' is a charade indicator (letters next to each other).
'gold' becomes 'or' ('or' is the heraldic name for gold).
'coffer' becomes 'chest' (I've seen this before).
'or'+'chest'='orchest'
'rate' put after 'orchest' is 'ORCHESTRATE'.
'putting' acts as a link.
(Other definitions for orchestrate that I've seen before include "Arrange scores" , "Organise (music)" , "Score (a piece)" , "Compose" , "Arrange (for maximum effect)" .)