Band of gold artist put round part of the trunk (9)
I believe the answer is:
orchestra
'band' is the definition.
(I've seen this before)
'gold artist put round part of the trunk' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'put round' means one lot of letters goes inside another.
'part of the trunk' becomes 'chest' ('chest' is part of 'trunk'**).
'or'+'ra'='orra'
'orra' enclosing 'chest' is 'ORCHESTRA'.
'of' is the link.
(Other definitions for orchestra that I've seen before include "kitchen setting?" , "Brass, woodwind, strings and percussion" , "Sort of stall" , "those who provide the music" , "Big band" .)