Toy for a windy day (4)
I believe the answer is:
kite
'toy for a windy day' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for kite that I've seen before include "It flies with string attached" , "Toy flown at the end of a string" , "Bird (that can be flown!)" , "Child's toy; bird of prey" , "Flying toy on a string" .)