Crossword Genius

Valid noise (5)

Ross

I believe the answer is:

sound

I believe this clue is a double definition.

'valid' is the first definition.
(similar in meaning)

'noise' is the second definition.
(I know that noise is a more specific form of the action sound)

(Other definitions for sound that I've seen before include "Speaking" , "note, for instance" , "Healthy; narrow channel" , "stretch of water" , "Fathom" .)

I've seen this clue in The Telegraph.
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