Bird on a string? (4)
I believe the answer is:
kite
This clue is a double definition.
'bird' is the first definition.
(I know that kite is a type of hawk)
'on a string?' is the second definition.
(I've seen this before)
(Other definitions for kite that I've seen before include "Flying toy; a quality mark" , "Light frame toy held on a string - bird of prey" , "Winger" , "Bird of prey; a plaything" , "Flying toy on a string" .)