Exhausted marksman (4)
I believe the answer is:
shot
I believe this clue is a double definition.
'exhausted' is the first definition.
(I've seen this in another clue)
'marksman' is the second definition.
(I've seen this in other clues)
(Other definitions for shot that I've seen before include "Attempt (to kill?)" , "Ruined; photo" , "Fired or filmed" , "Darted" , "Fired - pellet" .)