Wee hooter (5)
I believe the answer is:
owlet
'wee hooter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for owlet that I've seen before include "Baby bird; moth" , "Young bird; moth" , "who'll give a hoot?" , "Wise baby bird?" , "Small bird of prey from Africa and Asia" .)