Too big and bad-tempered to be called mousy? (5)
I believe the answer is:
ratty
'mousy?' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ratty that I've seen before include "Cross - character in "The Wind in the Willows"" , "with pests" , "Characteristic of pest" , "infestation of vermin" , "Character created by Kenneth Grahame" .)
