Bird’s cry as it loses height (3)
I believe the answer is:
owl
'bird's' is the definition.
(owl is a kind of bird)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for owl that I've seen before include "Head-swivelling night bird" , "You'll need hooter" , "Nightbird" , "Low kind of wise bird" , "Predator" .)