Attack by planes (3,4)
I believe the answer is:
air raid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">attack by planes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for air raid that I've seen before include "Attack by hostile aircraft" , "Attack flying" , "In wartime attack" , "Attack by planes" , "Aerial bomb attack" .)