Little hooter (5)
I believe the answer is:
owlet
'little hooter' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for owlet that I've seen before include "Young fly-by-night" , "Young nocturnal bird of prey" , "Junior member of parliament" , "One may give a little screech" , "Wise baby bird?" .)