Individual and editor in agreement (6)
I believe the answer is:
united
'in agreement' is the definition.
(similar in meaning)
'individual and editor' is the wordplay.
'individual' becomes 'unit' (I've seen this in other clues).
'and' is a charade indicator (letters next to each other).
'editor' becomes 'ed' (abbreviation).
'unit'+'ed'='UNITED'
(Other definitions for united that I've seen before include "Various football teams" , "Leeds, Sheffield or Manchester, perhaps" , "Allied, standing together" , "See 18" , "Joined together like Manchester soccer team" .)