Certain a dress is kinky around university (7)
I believe the answer is:
assured
'certain' is the definition.
(thesaurus)
'a dress is kinky around university' is the wordplay.
'is kinky' indicates an anagram.
'around' indicates putting letters inside.
'university' becomes 'u'.
'dress' is an anagram of 'ssred'.
'ssred' placed around 'u' is 'ssured'.
'a'+'ssured'='ASSURED'
(Other definitions for assured that I've seen before include "Gave confidence to" , "Secured" , "Informed with certainty and confidence" , "Confident, secure" , "Promised, guaranteed" .)