At university groups creating disturbances (6)
I believe the answer is:
upsets
'disturbances' is the definition.
(upset is a kind of disturbance)
'at university groups' is the wordplay.
'at university' becomes 'up'.
'groups' becomes 'sets' (set is a kind of group).
'up'+'sets'='UPSETS'
'creating' is the link.
(Other definitions for upsets that I've seen before include "Capsizes or disturbs" , "Disturbs or knocks over" , "Hassles" , "Disapppointments" , "Unexpected results" .)