Agitated by the disorder at university (3,2)
I believe the answer is:
het up
'agitated' is the definition.
(het up means agitated or upset)
'by the disorder at university' is the wordplay.
'by' says to put letters next to each other.
'disorder' indicates an anagram (a disordered version of the letters).
'at university' becomes 'up' (slang term meaning at university).
'the' is an anagram of 'het'.
'het' next to 'up' is 'HET UP'.
(Other definitions for het up that I've seen before include "On edge - agitated" , "Irate" , "Indignant" , "Overwrought" , "in a state" .)