Edit (4-6)

'edit' is the definition.
(I know that edit can be written as blue-pencil)
This is the entire clue.
(Another definition for blue-pencil that I've seen is " Censor".)
'edit' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for revise that I've seen before include "Go over studies again before exam" , "Prepare for exam" , "Swot for an exam" , "proof" , "Reread work to improve knowledge" .)
'edit' is the definition.
(I know that edit can be written as blue-pencil)
This is the entire clue.