Nine roaming around university in boredom (5)
I believe the answer is:
ennui
'boredom' is the definition.
('ennui' can be a synonym of 'boredom')
'nine roaming around university' is the wordplay.
'roaming' is an anagram indicator.
'around' means one lot of letters goes inside another.
'university' becomes 'u'.
'nine' is an anagram of 'enni'.
'enni' enclosing 'u' is 'ENNUI'.
'in' acts as a link.
(Other definitions for ennui that I've seen before include "to make one list less when connected" , "having nothing to do" , "tiredness" , "Bored listlessness" , "Mental weariness" .)