Related Clues:

• Suffer a public embarrassment, maybe
• Get wrong
• Take a header
• Expedition
• Suffer a 'brain cramp'
• Misstep
• Fall preceder, perhaps
• Fail to be perfect
• Show fallibility
• Overthrow a base
• Mechanism trigger
• Deviate
• Goof up
• Fall activity?
• Make a boo-boo