Criminals first to fall over songs in Malaysia (5)

I believe the answer is:

mafia

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'criminals' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for mafia that I've seen before include "Italian criminal organisation" , "Group exerting a hidden sinister influence" , "Criminal organisation with origin in Sicily" , "Criminal organisation also known as Cosa Nostra" , "Criminal group" .)

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

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