Note glut concerning children (9)

I believe the answer is:

overissue

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'note glut' is the definition.
The definition suggests a singular noun which matches the answer.

'concerning children' is the wordplay.
'concerning' becomes 'over' (I've seen this before).
'children' becomes 'issue' (I've seen this before).
'over'+'issue'='OVERISSUE'

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(Other definitions for overissue that I've seen before include "Supply too many" , "Too many notes" .)

I've seen this clue in The Times.

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