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' says to put letters next to each other.
'right' becomes 'r' (common 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" .)