Compulsion to remove university gown (5)
I believe the answer is:
dress
'gown' is the definition.
(thesaurus)
'compulsion to remove university' is the wordplay.
'compulsion' becomes 'duress' (I've seen this before).
'to remove' indicates named letters should be taken away.
'university' becomes 'u'.
'duress' with 'u' taken away is 'DRESS'.
(Other definitions for dress that I've seen before include "Robe" , "Adorn" , "To prepare" , "habit" , "get into gear" .)