Notes a hundred hits (5)

I believe the answer is:

chits

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'notes' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'a hundred hits' is the wordplay.
'a hundred' becomes 'c' (Roman numeral).
'c'+'hits'='CHITS'

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I've seen this clue in the Evening Standard.

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