Crossword Genius

Welcome subject of discussion – ask if vote helped out (5,2,3,5)

Ross

I believe the answer is:

speak of the devil

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'welcome subject of discussion' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'ask if vote helped out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'ask'+'if'+'vote'+'helped'='askifvotehelped'
'askifvotehelped' anagrammed gives 'SPEAK OF THE DEVIL'.

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I've seen this clue in The Guardian.
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