Reviser (6)
I believe the answer is:
editor
'reviser' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for editor that I've seen before include "Newspaper or publication chief" , "Person who revises and prepares for publication" , "One who determines the final content of a text" , "Script-preparer" , "Senior journalist" .)