Level of university class (7)
I believe the answer is:
uniform
'level' is the definition.
(thesaurus)
'university class' is the wordplay.
'university' becomes 'uni' (I've seen this in other clues).
'class' becomes 'form' (form class is a kind of class).
'uni'+'form'='UNIFORM'
'of' is the link.
(Other definitions for uniform that I've seen before include "Homogeneous" , "The clothing is always the same," , "Regular - soldier's dress" , "Flat" , "Alike all over" .)