Leave a bar, accompanied by university teacher (7)
I believe the answer is:
abandon
'leave' is the definition.
(abandoning is a kind of leaving)
'a bar accompanied by university teacher' is the wordplay.
'bar' becomes 'ban' (I've seen this before).
'accompanied by' 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 "Desert, forsake" , "Lack of constraint" , "Jack in" , "Forsake - careless freedom" , "Walk out on" .)