Writing style in written message in note (9)

I believe the answer is:

lettering

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'writing style' is the definition.
'lettering' can be an answer for 'writing' (lettering is a kind of writing). I'm not sure about the 'style' bit.

'written message in note' is the wordplay.
'written message' becomes 'letter' (I've seen this before).
'note' becomes 'g' (musical note).
'letter'+'in'+'g'='LETTERING'

'in' acts as a link.

Can you help me to learn more?

(Another definition for lettering that I've seen is " Inscribed decorative characters".)

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

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