Animal that preys on others (8)
I believe the answer is:
predator
'animal that preys on others' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for predator that I've seen before include "Animal that hunts others for food" , "Hunting animal" , "eg 19" , "Hunting creature" , "eagle, say" .)