Crossword Genius

Stern about editor that’s set up proof-corrector (6)

Ross

I believe the answer is:

reader

'proof-corrector' is the definition.
(I've seen this before)

'stern about editor that's set up' is the wordplay.
'stern' becomes 'rear' ('rear' can be a synonym of 'stern').
'about' means one lot of letters goes inside another.
'editor' becomes 'ed'.
'that's set up' is a reversal indicator.
'ed' written backwards gives 'de'.
'rear' enclosing 'de' is 'READER'.

(Other definitions for reader that I've seen before include "Times subscriber, perhaps?" , "Person addressed by author" , "She lectures" , "Reared by book lover" , "Person perusing a book or newspaper" .)

I've seen this clue in The Times.
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