Related Clues:

• Hardly a mark of distinction
• Bonnie's sidekick
• Unenviable grade
• 65 or so
• Grade above ef
• Actress Frances
• Nearly failing
• It makes ma mad
• Scotland's longest river
• Whoop- -- -doo
• Fiddle's two-time follower
• Media center?
• Hum-dum divider
• Inferior grade
• Near failure