Improve a bit, making sense at university (5,2)
I believe the answer is:
touch up
'improve a bit' is the definition.
(I've seen this before)
'sense at university' is the wordplay.
'sense' becomes 'touch' (touching is a kind of sensing).
'at university' becomes 'up' ('up' can mean studying at university).
'touch'+'up'='TOUCH-UP'
'making' acts as a link.
(Other definitions for touch up that I've seen before include "Restore" , "Improve (painting) with little strokes" , "improvement" , "Alter to improve appearance" , "improve a bit" .)