A nose for noise? (6)

I believe the answer is:

hooter

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'a nose' is the definition.
(hooter is a kind of nose)

I don't understand how the remainder of the clue works.

(Other definitions for hooter that I've seen before include "One scents" , "Car horn or slang nose" , "owl?" , "Gnomon" , "Siren, horn; nose" .)

I've seen this clue in the Evening Standard.

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