Owl's nose (6)
I believe the answer is:
hooter
This clue might be a double definition.
'owl's' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'nose' is the second definition.
(hooter is a kind of nose)
Can you help me to learn more?
(Other definitions for hooter that I've seen before include "Uphill stone pusher (Gk. myth)" , "Warning sound" , "it smells" , "One scents" , "alarm" .)