Crossword Genius

Correct from the first person up to the last (5)

Ross

I believe the answer is:

emend

'correct' is the definition.
(thesaurus)

'the first person up to the last' is the wordplay.
'the first person' becomes 'me' (first-person pronoun).
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'to the last' becomes 'end'.
'me' written backwards gives 'em'.
'em'+'end'='EMEND'

'from' acts as a link.

(Other definitions for emend that I've seen before include "get rid of faults" , "Edit, improve" , "Correct and improve the text" , "Modify" , "make an improvement" .)

I've seen this clue in The Independent.
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