"Corrector” renamed to "corrected” (9)

I believe the answer is:

emendator

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'corrector' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?

'renamed to corrected' is the wordplay.
'corrected' indicates anagramming the letters.
'renamed'+'to'='renamedto'
'renamedto' anagrammed gives 'EMENDATOR'.

Can you help me to learn more?

(Another definition for emendator that I've seen is " One corrects".)

I've seen this clue in The Times.

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