Reasons may see politician abandoning universities (6)
I believe the answer is:
causes
'reasons' is the definition.
'politician abandoning universities' is the wordplay.
'politician' becomes 'pm'.
'abandoning' indicates named letters should be taken away.
'universities' becomes 'campuses'.
'campuses' with 'pm' taken away is 'CAUSES'.
'may see' acts as a link.
(Other definitions for causes that I've seen before include "They give rise to effects" , "They produce effects" , "Gives rise to -- crusades" , "'Reasons, grounds (6)'" , "Factors" .)