Related Clues:

• See 9-Across
• Go off course
• Boner
• Do this to prove you're human
• Dropped pop-up, e.g.
• Screw-up
• Lapse
• One way to get to first base
• Be human
• Blow one's lines, e.g.
• Foul up
• Sin
• Need correcting
• Diamond goof
• Elicit a 26-Down