Attack from the air (4-4)
'attack from the air' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for strafe that I've seen before include "Bombard" , "Attack with fire from a low-flying plane" , "Attack with machine-guns from the air" , "Attack with machine-gun fire" , "Attack from the air with machine guns" .)
(Other definitions for dive-bomb that I've seen before include "Attack from a rapidly descending plane" , "Aerially attack target" , "Attack from a steep angle" , "Perform a steep aerial attack on (a target)" , "Moved bib (anag.)" .)