Dodge exceptionally mean girl (8)
I believe the answer is:
malinger
'dodge' is the definition.
(thesaurus)
'exceptionally mean girl' is the wordplay.
'exceptionally' indicates anagramming the letters.
'mean'+'girl'='meangirl'
'meangirl' anagrammed gives 'MALINGER'.
(Other definitions for malinger that I've seen before include "Pretend to be sick" , "Avoid duty by pretending sickness" , "Skive by pretending to be ill" , "Loaf about in germinal way" , "skive off school, maybe" .)