Switching vote if course not working (3,2,7)

I believe the answer is:

out of service

'not working' is the definition.
(out of service can mean faulty or not working)

'switching vote if course' is the wordplay.
'switching' indicates an anagram.
'vote'+'if'+'course'='voteifcourse'
'voteifcourse' anagrammed gives 'OUT OF SERVICE'.

I've seen this clue in The Telegraph.

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