Doing university? I am not finished yet! (2,2)
I believe the answer is:
up to
'doing' is the definition.
(as in 'what are you up to?')
'university? i am not finished yet' is the wordplay.
'university?' becomes 'u'.
'i am not finished yet' becomes 'pto' (please turn over).
'u'+'pto'='UP TO'
(Other definitions for up to that I've seen before include "As many as, though no more" , "working at > till" , "Incumbent upon" , "As far as or as many as" , "Busy with" .)