Crossword Genius

Boss with old motor for heavy metal fan (10)

Ross

I believe the answer is:

headbanger

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

'heavy metal fan' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'boss with old motor' is the wordplay.
'boss' becomes 'head' (synonyms).
'with old motor' becomes 'banger' (I can't explain this - if you can you should give a lot more credence to this answer).
'head'+'banger'='HEADBANGER'

'for' is the link.

Can you help me to learn more?

(Other definitions for headbanger that I've seen before include "Heavy-metal rock fan" , "crazy individual" , "Old music lover" .)

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