Man wants a vote on principle (5)
I believe the answer is:
axiom
'principle' is the definition.
(I've seen this in another clue)
'man wants a vote on' is the wordplay.
'man wants' becomes 'iom' (I can't explain this - if you can you should believe this answer much more).
'vote' becomes 'x' (how votes are marked).
'on' is a charade indicator (letters next to each other).
'a'+'x'='ax'
'iom' after 'ax' is 'AXIOM'.
Can you help me to learn more?
(Other definitions for axiom that I've seen before include "Truism - proverb" , "Old saying or precept 95)" , "Fundamental proposition" , "Universally accepted proposition" , "Accepted statement taken as self-evidently true" .)