Related Clues:

• Perplexing
• Nonfunctioning
• See 59-Down
• Like an unmatched sock
• "That's strange"
• Puzzling
• Screwy
• Unplugged
• Uneven
• Roulette option
• At leisure
• Like 1, 3 or 5
• Lacking a mate
• Curious
• Like Simon's couple