Type of homicide (12)
I believe the answer is:
manslaughter
'type of homicide' is the definition.
(I know that manslaughter is a type of homicide)
This is the entire clue.
(Other definitions for manslaughter that I've seen before include "Crime of unpremeditated killing" , "Crime of killing, short of murder" , "Killing without malice" , "Unlawful killing" , "Homicide without malice aforethought" .)