Airborne toy with a tail (4)
I believe the answer is:
kite
'airborne toy with a tail' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kite that I've seen before include "Wind-borne frame" , "Bird of prey; a plaything" , "Flying toy; a quality mark" , "Toy; aircraft (dated)" , "Toy that flies on end of string" .)