Character with one arm (6)
I believe the answer is:
pistol
I believe this is a double definition.
'character' is the first definition.
(I have seen 'Shakespearean character' mean 'pistol' so perhaps 'character' could also mean 'pistol')
'one arm' is the second definition.
(pistol is a kind of arm)
'with' acts as a link.
(Other definitions for pistol that I've seen before include "Hand-held firearm" , "Small gun" , "Arm" , "Piece" , "Hand weapon" .)