I don't care for messing with the editorial process (9)
I believe the answer is:
redaction
'the editorial process' is the definition.
(process of redacting parts of a piece of writing)
'i don't care for messing' is the wordplay.
'for messing' indicates an anagram.
'i'+'dont'+'care'='idontcare'
'idontcare' is an anagram of 'REDACTION'.
'with' acts as a link.
(Other definitions for redaction that I've seen before include "that's needed if text is poor" , "Amended written account" , "text version" , "Edited version" , "writing" .)