Possible Clues:

• Answer needed as puzzle's not completed on time
• Counter an argument
• Defeat seen on television by right back
• Deny the potato, for instance, is making a comeback
• Root around this counter
• Repel nasty brute
• Prove (claim) false
• Disprove this, although it comes again, perhaps
• Disprove an accusation
• Refute - disprove