Shoots aircraft (4)
I believe the answer is:
jets
I believe this clue is a double definition.
'shoots' is the first definition.
(both can mean sprays or spurts)
'aircraft' is the second definition.
(jet is a type of aircraft)
(Other definitions for jets that I've seen before include "Rapid streams of liquid or gas" , "Aeroplanes - Sharks rivals in "West Side Story"" , "Water spouts or fast planes" , "Fast airplanes" .)