Tempt liberal university with right drug (4)
I believe the answer is:
lure
'tempt' is the definition.
(synonyms)
'liberal university with right drug' is the wordplay.
'liberal' becomes 'l' (abbreviation).
'university' becomes 'U' (abbreviation for university).
'with' is a charade indicator (letters next to each other).
'right' becomes 'r' (abbreviation).
'drug' becomes 'e' (E is another name for ecstasy).
'l'+'u'+'r'+'e'='LURE'
(Other definitions for lure that I've seen before include "Tempt with some kind of reward" , "draw" , "Tempt invoking rule" , "Type of bait" , "Entice, bait" .)