Casualty (6)
I believe the answer is:
victim
'casualty' is the definition.
(both can mean someone injured or killed)
This is the entire clue.
(Other definitions for victim that I've seen before include "Injured person; dupe" , "One made to suffer" , "Casualty or scapegoat" , "Person who suffers accident or crime" , "Oppressed or suffering person" .)