Weapon wounded large animal (7)
I believe the answer is:
cutlass
'weapon' is the definition.
(cutlass is a kind of weapon)
'wounded large animal' is the wordplay.
'wounded' becomes 'cut' (I've seen this before).
'large' becomes 'L' (eg in clothes sizes).
'animal' becomes 'ass' (term for a donkey).
'cut'+'l'+'ass'='CUTLASS'
(Other definitions for cutlass that I've seen before include "Curved, one-edged sword" , "Short broad sword" , "Old sailor's sword" , "Short, heavy curved sword" , "Short, broad-bladed sword" .)