Short, boastful fellow delivers vote (4,2,5)
I believe the answer is:
show of hands
'vote' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for show of hands that I've seen before include "Informal vote" , "at end of poker betting" , "Vote for possible action" , "At end of poker round" , "Public vote" .)