Orders that singers are revised (11)

I believe the answer is:

straightens

'orders' is the definition.
(straightening is a kind of ordering)

'that singers are revised' is the wordplay.
'are revised' indicates anagramming the letters.
'that'+'singers'='thatsingers'
'thatsingers' is an anagram of 'STRAIGHTENS'.

I've seen this clue in The Globe and Mail.

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