Repulsive new audience accommodation a university installed (10)
I believe the answer is:
nauseating
'repulsive' is the definition.
(thesaurus)
'new audience accommodation a university installed' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'audience accommodation' becomes 'seating' (where the audience sits).
'university' becomes 'U' (abbreviation for university).
'installed' means one lot of letters goes inside another.
'a'+'u'='au'
'n'+'seating'='nseating'
'nseating' placed around 'au' is 'NAUSEATING'.
(Other definitions for nauseating that I've seen before include "being hard to keep down" , "Revolting" , "arousing unpleasant feeling" , "Stomach-turning" , "Loathsome" .)