King supporting college? That's evident (5)
I believe the answer is:
clear
'evident' is the definition.
('clear' can be a synonym of 'evident')
'king supporting college?' is the wordplay.
'king' becomes 'lear' (I've seen this before).
'supporting' means one lot of letters go next to another (in a down clue, some letters go below others).
'college?' becomes 'c'.
'lear' put after 'c' is 'CLEAR'.
'that's' is the link.
(Other definitions for clear that I've seen before include "Set free of charges" , "Pellucid" , "Get net" , "Unimpeded" , "Obvious; remove obstructions from" .)