Crossword puzzle clue "copy editor's quarry"

Copy editor's quarry

Copy editor's quarry

Quarry's quarry: 1970

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

Suited to be a copy editor, say

"Evolution" group, to an overzealous copy editor?

"Hysteria" group, to an overzealous copy editor?

Copy editor's mark