Take back gold instrument (9)
I believe the answer is:
retractor
'instrument' is the definition.
(retractor is a kind of instrument)
'take back gold' is the wordplay.
'take back' becomes 'retract' (I've seen this before).
'gold' becomes 'or' ('or' is the heraldic name for gold).
'retract'+'or'='RETRACTOR'
(Other definitions for retractor that I've seen before include "One withdraws" , "Muscle" , "It must pull back" , "that springs back in reverse?" , "Instrument" .)