Irritable, informally (5)

I believe the answer is:
ratty
(Other definitions for ratty that I've seen before include "Irritable (informal)" , "Short" , "One messing about in a boat" , "Bad-tempered, irritable as a rodent" , "with pests" .)
I believe the answer is:
ratty
(Other definitions for ratty that I've seen before include "Irritable (informal)" , "Short" , "One messing about in a boat" , "Bad-tempered, irritable as a rodent" , "with pests" .)