Rebellion at university on the increase (8)
I believe the answer is:
uprising
'rebellion' is the definition.
(I know that rebellion can be written as uprising)
'at university on the increase' is the wordplay.
'at university' becomes 'up' ('up' can mean studying at university).
'on the increase' becomes 'rising' (I've seen this in another clue).
'up'+'rising'='UPRISING'
(Other definitions for uprising that I've seen before include "A revolting action?" , "Insurrection or revolt" , "Rebellion, revolt" , "Organised opposition to authority" , "revolution" .)