University students' education neglected (6)
I believe the answer is:
unused
'neglected' is the definition.
(thesaurus)
'university students' education' is the wordplay.
'university' becomes 'u' (abbreviation for university).
'students'' becomes 'nus' (National Union of Students).
'education' becomes 'ed' (abbreviation - e.g. sex ed).
'u'+'nus'+'ed'='UNUSED'
(Other definitions for unused that I've seen before include "Remaining: inexperienced" , "factory fresh" , "Neither employed nor second-hand" , "Mint, virgin" , "Extra" .)