Music-makers in Manly reserve (5)

I believe the answer is:

lyres

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'music-makers' is the definition.
I can't tell whether this defines the answer.

'in manly reserve' is the wordplay.
'in' indicates a hidden word.
'LYRES' can be found hidden inside 'manly reserve'.

Can you help me to learn more?

(Another definition for lyres that I've seen is " Ancient Greek harps".)

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

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