Crossword Genius

Bust artist pursuing gold, brass, etc (9)

Ross

I believe the answer is:

orchestra

I'm a little stuck... Click here to teach me more about this clue!

'brass etc' is the definition.
I can't tell whether this defines the answer.

'bust artist pursuing gold' is the wordplay.
'bust' becomes 'chest' (I've seen this before).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'pursuing' is a charade indicator (letters next to each other).
'gold' becomes 'or' ('or' is the heraldic name for gold).
'chest'+'ra'='chestra'
'chestra' put after 'or' is 'ORCHESTRA'.

Can you help me to learn more?

(Other definitions for orchestra that I've seen before include "Big band" , "Musical ensemble" , "Musicians, maybe in theatre" , "Gamelan, for instance" , "Large band of players" .)

I've seen this clue in The Independent.
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