Leave a bar with university teacher (7)
I believe the answer is:
abandon
'leave' is the definition.
(abandoning is a kind of leaving)
'a bar with university teacher' is the wordplay.
'bar' becomes 'ban' (I've seen this before**).
'with' says to put letters next to each other.
'university teacher' becomes 'don' (I've seen this before).
'a'+'ban'+'don'='ABANDON'
(Other definitions for abandon that I've seen before include "Give up; leave behind" , "Desert; intemperance" , "Desert or yield without restraint" , "Jack in" , "Forsake with recklessness" .)