Crossword Genius

A funny noise? (4)

Ross

I believe the answer is:

hoot

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But I can't explain it at all! Could you help me understand?

(Other definitions for hoot that I've seen before include "Honk - laugh" , "Owlish cry" , "Owl's sound" , "noise made by 7 [WOOD-OWL]" , "what's voiced in parliament?" .)

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