Ill-tempered, nagging and mousy? (8)
I believe the answer is:
shrewish
'ill-tempered' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for shrewish that I've seen before include "Like Kate" , "Sharp-tongued" , "inclined to nag?" , "(Of a woman) nagging" .)