She's noted for being very loud, that is (5)

I believe the answer is:

effie

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'she's' is the definition.

'noted for being very loud that is' is the wordplay.
'noted for being' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'very loud' becomes 'ff' (musical abbreviation for 'fortissimo', very loud).
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'e'+'ff'+'ie'='EFFIE'

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I've seen this clue in the Evening Standard.

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