Related Clues:

• Crown wearer
• Manuscript annotation
• Proofing mark
• ''Leave it in,'' editorially
• Margin notation
• Proofreader's notation
• Marginal mark, perhaps
• Cap setting
• Proofer's ''nevermind''
• Editor's note
• Cap wearer
• Proofing note
• Nail partner
• Canine, e.g.
• Editor's 'never mind'