Top supporter raised revolver? (7,3)

I believe the answer is:

ceiling fan

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'raised revolver?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'top supporter' is the wordplay.
'top' becomes 'ceiling' (I can't explain this - if you can you should give a lot more credence to this answer).
'supporter' becomes 'fan' (fan is a kind of supporter).
'ceiling'+'fan'='CEILING FAN'

Can you help me to learn more?

(Another definition for ceiling fan that I've seen is " air-conditioner".)

I've seen this clue in the Sydney Morning Herald.

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