Related Clues:

• Misconception
• Mistake
• Overthrow, perhaps
• Dropped fly, e.g.
• Bobble or overthrow
• Inaccuracy
• Boob
• Trial companion
• Certain computer message
• Overthrow, say
• Failing
• 2 + 2 = 5, e.g.
• Typo, for one
• Baseball blunder
• Mishandled fly, e.g.