Ship's front weapon (3)
I believe the answer is:
bow
This clue is a double definition.
'ship's front' is the first definition.
(I've seen this in another clue)
'weapon' is the second definition.
(I know that bow is a type of weapon)
(Other definitions for bow that I've seen before include "Bend; knot; weapon" , "Genuflect" , "Acknowledge applause as actor does" , "Incline respectfully; a weapon" , "Bend in reverence or submission" .)