Related Clues:

• It concludes ''Edwin Drood''
• Unenviable mark
• Tapered end
• Passing grade, barely
• 62 or so
• Almost failing grade
• Start to dig?
• It makes one done
• Twisted Sister Snider
• Fourth grade?
• Dennis's sister on "It's Always Sunny"
• '___-lish!' ('Yum!')
• Mark in the 60s
• Mark of concern
• Letter that's also a name