Noisy nose? (6)

I believe the answer is:

hooter

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

I cannot understand how the remainder of the clue works.

(Other definitions for hooter that I've seen before include "Uphill stone pusher (Gk. myth)" , "alarm" , "It makes a loud noise" , "Siren, steam whistle" , "it smells" .)

I've seen this clue in the Evening Standard.

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