College declaration (5)
I believe the answer is:
major
'college declaration' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for major that I've seen before include "Word to describe key" , "Important - ex-PM" , "5,27 [PRIME MINISTER]" , "Main course" , "Army officer immediately junior to a lieutenant colonel" .)