Coffer artist depicted with golden band (9)
I believe the answer is:
orchestra
'band' is the definition.
(musical band)
'coffer artist depicted with golden' is the wordplay.
I cannot really understand how this works, but
'coffer' could be 'chest' (I've seen this before) and 'chest' is located in the answer.
'artist' could be 'ra' (Royal Academician, member of Royal Academy of Arts) and 'ra' is located in the answer.
'golden' could be 'or' ('or' is the name for gold in heraldry) and 'or' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for orchestra that I've seen before include "Large group of players" , "Big group of musicians playing various instruments" , "Eg, LSO, RPO" , "An assembly of musicians with various instruments" , "many players" .)