Attack by plane (6)
I believe the answer is:
strafe
'attack by plane' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for strafe that I've seen before include "Pepper" , "Attack with gunfire from the air" , "Attack with machine guns or cannon from a low-flying plane" , "Attack with fire from a low-flying plane" , "use machine-guns" .)