Brief record about net composition (7)

I believe the answer is:

nonette

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'composition' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'brief record about net' is the wordplay.
'brief record' becomes 'note' (I've seen this before).
'about' indicates putting letters inside.
'note' enclosing 'net' is 'NONETTE'.

Can you help me to learn more?

(Another definition for nonette that I've seen is " group composition".)

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

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