Pilot's new gun (6)
I believe the answer is:
pistol
'gun' is the definition.
(pistol is a kind of gun)
'pilot's new' is the wordplay.
'new' indicates an anagram.
'pilots' anagrammed gives 'PISTOL'.
(Other definitions for pistol that I've seen before include "Shakespearean character" , "Small firearm" , "making an appearance in Shakespeare's King Henry V" , "pop" , "Spoilt these guns" .)