Make sure, at university, to have an examination (5,2)
I believe the answer is:
check up
'an examination' is the definition.
(I've seen this before)
'make sure at university' is the wordplay.
'make sure' becomes 'check' (synonyms).
'at university' becomes 'up' (slang term meaning at university).
'check'+'up'='CHECK-UP'
'to have' acts as a link.
(Other definitions for check up that I've seen before include "This should make sure" , "test" , "Examination" .)