Crossword puzzle clue "u s writer and editor"

A crossword editor has to be very careful when changing one--unlike this puzzle's editor, who was careless four times herein

U. S. writer and editor

Editor/writer Peter

Writer's editor, of a sort

Writer-to-editor initial contact

Writer/editor Brown

Slender spear of the Bantu-speaking people: Var. (editor here: the answer is ASSAGAI. Just fill it in and we'll pretend like this never happened.)

Sci-fi author and former Omni editor Ben