Groan about a music-maker (5)

I believe the answer is:

organ

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'a music-maker' is the definition.
I can't judge whether this defines the answer.

'groan about' is the wordplay.
'about' indicates an anagram.
'groan' anagrammed gives 'ORGAN'.

Can you help me to learn more?

(Other definitions for organ that I've seen before include "Instrument with stops" , "Stopped instrument" , "daily?" , "Possibly the heart" , "Eg, heart/liver" .)

I've seen this clue in The Irish News.

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