Related Clues:

• One in opposition
• Standing against
• Adversary in Satan, ticklish
• Relative of contra-
• Unsupportive one
• Saying nay
• Opposition position
• Contra
• Opponent cannot win, being regularly eliminated
• 'Freeze' tag?
• Prefix with "climax"
• Starter like contra-
• Objecting one
• ___-aging cream
• Arguing against