At university group creates disorder (5)
I believe the answer is:
upset
'disorder' is the definition.
('upset' can be a synonym of 'disorder')
'at university group' is the wordplay.
'at university' becomes 'up'.
'group' becomes 'set' (set is a kind of group).
'up'+'set'='UPSET'
'creates' is the link.
(Other definitions for upset that I've seen before include "Overturn; distress" , "Surprise win" , "Unhappy or worried state of mind" , "Disturbed or capsized" , "Surprise result" .)