Crowned heads at college (5)
I believe the answer is:
kings
I believe this clue is a double definition.
'crowned heads' is the first definition.
(king is a kind of crowned head)
'college' is the second definition.
(King's College London)
'at' acts as a link.
(Other definitions for kings that I've seen before include "Two-part book" , "Name of two Old Testament books" , "Valley of the - -" , "Honours" , "Not subjects among those" .)