After university, English girl somehow is more unattractive (6)
I believe the answer is:
uglier
'more unattractive' is the definition.
('ugly' is associated in meaning with 'unattractive')
'after university english girl somehow' is the wordplay.
'after' says to put letters next to each other.
'university' becomes 'u'.
'english' becomes 'e' (abbreviation).
'somehow' indicates anagramming the letters.
'e'+'girl'='egirl'
'egirl' with letters rearranged gives 'glier'.
'u' put next to 'glier' is 'UGLIER'.
'is' acts as a link.
(Other definitions for uglier that I've seen before include "More unpleasant to look at" , "More horrible" , "More displeasing to the senses" , "Less pleasing to look at" , "Not so pretty" .)