Hiding rubbish around university (4)
I believe the answer is:
rout
'hiding' is the definition.
(thesaurus)
'rubbish around university' is the wordplay.
'rubbish' becomes 'rot' (I've seen this before**).
'around' means one lot of letters goes inside another.
'university' becomes 'u'.
'rot' placed around 'u' is 'ROUT'.
(Other definitions for rout that I've seen before include "Put to flight in disarray" , "Drubbing" , "Put to flight, disperse" , "Headlong flight" , "Complete defeat" .)