Answer: coeditor

AnswerCrossword Clue
COEDITORPart of a literary team
COEDITORPublishing employee
COEDITOROne who shares a masthead billing
coeditorone that coedits (to edit together)
coeditorwith together joint jointly coexist coheir
coeditorperson who cooperates or collaborates as editor with another
coeditoror to the same degree coextensive