Wounded in the arm? (4)
I believe the answer is:
shot
I believe this is a double definition.
'wounded' is the first definition.
(I've seen this before)
'the arm?' is the second definition.
(shot is a kind of arm)
'in' acts as a link.
(Other definitions for shot that I've seen before include "Wounded" , "Fired from a weapon" , "Zoomed" , "description of some silk" , "Used a gun" .)