Short-horned grasshopper (6)
I believe the answer is:
locust
'short-horned grasshopper' is the definition.
(locust is a kind of short-horned grasshopper)
This is all the clue.
(Other definitions for locust that I've seen before include "Predatory grasshopper that swarms" , "Part of destructive plague" , "Destructive creature" , "It strips plants" , "Voracious African or Asian grasshopper" .)