Leg appears in sets of old music makers (7)

I believe the answer is:

spinets

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'music makers' is the definition.
(spinet is a kind of musical instrument)

'leg appears in sets' is the wordplay.
'leg' becomes 'pin' (pin is a kind of leg).
'appears in' is an insertion indicator.
'pin' going within 'sets' is 'SPINETS'.

'of old' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

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

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