Vote of support (3)
I believe the answer is:
yea
'vote of support' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yea that I've seen before include "Affirmative vote" , "I'm pro" , "MP's 'Yes' vote" , "Emphatic agreement" , "'She loves you, ... ... ...' (The Beatles)" .)