In university there's no end, sadly, of oblique insinuation (8)
I believe the answer is:
innuendo
'oblique insinuation' is the definition.
'innuendo' can be an answer for 'insinuation' (synonyms). I'm not sure about the 'oblique' bit.
'in university there's no end sadly' is the wordplay.
'university' becomes 'U' (abbreviation for university).
'there's' says to put letters next to each other.
'sadly' indicates anagramming the letters.
'u'+'no'+'end'='unoend'
'unoend' anagrammed gives 'nuendo'.
'in'+'nuendo'='INNUENDO'
'of' is the link.
Can you help me to learn more?
(Other definitions for innuendo that I've seen before include "Rude suggestion" , "Subtle disparagement" , "Indirect reference to something rude" , "Naughty suggestion" , "Indirect remark" .)