Related Clues:

• Had a slice of humble pie
• Humbled oneself, perhaps
• Admitted wrongness
• Was humbled publicly
• Was duly humiliated
• Admitted fault, informally
• Had to admit an error
• Admitted to an embarrassing error
• Partook of humble pie
• Had a heaping helping of humility
• Acknowledged a mistake
• Had to admit a goof-up