Prevent Right taking away vote (5)
I believe the answer is:
deter
'prevent' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for deter that I've seen before include "Frighten off; prevent" , "Discourage, put off" , "Discourage (an activity)" , "Put off (from an action)" , "Put (someone) off" .)