Crossword Genius

Worry greatly about not perhaps reading perfectly (4)

Ross

I believe the answer is:

dead

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'perfectly' is the definition.
(synonyms)

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(Other definitions for dead that I've seen before include "Defunct" , "Not quick" , "Late; exact" , "Exhausted -- layabout" , "No longer alive" .)

I've seen this clue in The Independent.
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