Confused elector's choice could block decision? (4)
I believe the answer is:
veto
'block decision?' is the definition.
'veto' can be an answer for 'block' (to veto is to block a decision or action). I am not sure about the 'decision?' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for veto that I've seen before include "Refusal to assent" , "Don't allow" , "Embargo" , "Vote that blocks a decision" , "Blocking vote" .)