Who votes for surrender? (5,2)
I believe the answer is:
hands up
I believe this is a double definition.
'who votes' is the first definition.
('hands up for' something means 'who votes for' it)
'surrender?' is the second definition.
'for' acts as a link.
(Other definitions for hands up that I've seen before include "Who knows" , "Armed robber's order" , "order to surrender" , "Demand from an armed robber?" , "Highwayman's instruction" .)