Related Clues:

• Long, narrow opening
• 36-Across opening
• Narrow space
• Long narrow cut
• Long straight cut
• Operation creation
• Buttonhole, e.g
• Start of many an operation
• Old Bob illuminated the opening
• Straight, narrow cut
• Common Oscar gown feature
• Narrow gap
• Buttonhole, basically
• Buttonhole, for example
• Knife cut