Peers initially ignored vote? (3)

I believe the answer is:

yes

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'vote?' is the definition.
(I have seen 'Pro vote ' mean 'yes' so perhaps 'vote' could also mean 'yes')

I can't explain the remainder of the clue.

(Other definitions for yes that I've seen before include "Yea" , "Confirmation" , "Pro vote" , "Affirmative response" , "Absolutely" .)

I've seen this clue in The Times.

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