Ill-temper shown by a girl in a muddle (8)
I believe the answer is:
meanness
'ill-temper shown' is the definition.
I can't judge whether this definition defines the answer.
'a girl in a muddle' is the wordplay.
'a girl' becomes 'anne' (girl's name).
'in' indicates putting letters inside.
'a muddle' becomes 'mess' (synonyms).
'anne' going inside 'mess' is 'MEANNESS'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for meanness that I've seen before include "significant failure of charity" , "spite" , "Lack of generosity" , "Scrooge-like quality" , "Miserly quality" .)