Purifies CID's finest roughly (10)

I believe the answer is:

disinfects

'purifies' is the definition.
(I've seen this before)

'cid's finest roughly' is the wordplay.
'roughly' indicates anagramming the letters.
'cids'+'finest'='cidsfinest'
'cidsfinest' with letters rearranged gives 'DISINFECTS'.

(Another definition for disinfects that I've seen is " purifies".)

I've seen this clue in the Sydney Morning Herald.

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