Sound coming from piano is extraordinary (5)

I believe the answer is:

noise

'sound' is the definition.
(noise is a kind of sound)

'coming from piano is extraordinary' is the wordplay.
'coming from' indicates the answer is hidden within the clue.
'NOISE' is hidden within 'piano is extraordinary'.

(Other definitions for noise that I've seen before include "Static - sound" , "Confused sounds" , "Sound, disagreeable perhaps" , "Unwelcome sound" , "Loud sound; bruit" .)

I've seen this clue in The Times.

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