Related Clues:

• Lose money on "Jeopardy!"
• Try to fit a square peg in a round hole, e.g.
• Commit catcher's interference, e.g.
• Botch something up
• Drop a brick, so to speak
• Sail off-course, e.g.
• Go amiss
• "To __ is human ..."
• Sales __
• Make a wrong move
• Do something wrong
• Commit 18-Down
• Wander off course, e.g.
• Flub it
• Betray fallibility