Independent wanting vote is persistent (7)
I believe the answer is:
eternal
'persistent' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for eternal that I've seen before include "always to be remembered" , "unchanged by time" , "Never failing" , "'Lasting forever, unending (7)'" , "Undying" .)