Bulletproof garment (4)
I believe the answer is:
vest
'bulletproof garment' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for vest that I've seen before include "Clothing" , "Top" , "Sleeveless garment" , "Undergarment covering trunk of body" , "Waistcoat (in N. America)" .)