Improvement may be made in note (10)

I believe the answer is:

emendation

'improvement' is the definition.
(I know that emendation is a type of rectification)

'may be made in note' is the wordplay.
'may be' is an anagram indicator.
'made'+'in'+'note'='madeinnote'
'madeinnote' anagrammed gives 'EMENDATION'.

(Another definition for emendation that I've seen is " Correction".)

I've seen this clue in The Irish Independent.

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