Related Clues:

• Letters that flunk
• Gee preceders
• Sign of poor schoolwork
• Two of fifty
• They keep you from passing
• Reasons for repeats, maybe
• 29-Down killers
• Abysmal grades
• Small apartments, in ads
• Marks of failure
• Two from fifty?
• Small apts.
• Affluent duo?
• 40% of fifty?
• Letters before gees