Sensitive girl, Clea, all of a muddle (8)
I believe the answer is:
allergic
'sensitive' is the definition.
(I've seen this in another clue)
'girl clea all of a muddle' is the wordplay.
'girl clea' anagrams to 'ALLERGIC'.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for allergic that I've seen before include "Having unfavourable reaction as to certain foods, pollen etc" , "Responding badly (to something)" , "Hypersensitive to something" , "Having an abnormal reaction to something" , "Vulnerable or sensitive to, perhaps pollen" .)