Beach toy for a windy day (4)
I believe the answer is:
kite
'beach 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 "Bird of prey - light, wind-borne structure" , "Hawk-like bird" , "High as a - -" , "Flying toy on a string" , "aeroplane" .)