Ban university that’s upset Disney? (6)
I believe the answer is:
outlaw
'ban' is the definition.
(I've seen this in another clue)
'university that's upset disney?' is the wordplay.
'university' becomes 'ou'.
'that's upset' says the letters should be written in reverse.
'disney?' becomes 'Walt' (Walt Disney).
'walt' back-to-front is 'tlaw'.
'ou'+'tlaw'='OUTLAW'
(Other definitions for outlaw that I've seen before include "Irish Tory" , "Robin Hood figure?" , "Ban - bandit" , "bar" , "Ban, prohibit by legislation" .)