Senior member of a college or university (6)
I believe the answer is:
fellow
'senior member of a college or university' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fellow that I've seen before include "Colleague" , "Boy or man" , "Companion or associate" , "Kind of associate, may be a traveller with communism" , "The other of a pair, or a college member" .)