Locust (6)
I believe the answer is:
cicada
'locust' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cicada that I've seen before include "Chirpy type" , "one that loves the heat" , "Insect, produces high-pitched drone" , "Large chirping insect" , "chirpy creature" .)