Attack from the sky (3,6)
'attack from the sky' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for air raid that I've seen before include "Blitz" , "Bombing attack" , "In wartime attack" , "Attack by hostile aircraft" , "Attack by planes" .)
(Other definitions for air strike that I've seen before include "shot from above" , "Bombing attack" , "makes flight impossible?" .)