Related Clues:

• Quash return of Murphy's supporter
• Repel nasty brute
• Prove (claim) to be false
• Deny overthrow of King Edward, for example
• Deny claim potato's rejected?
• Answer needed as puzzle's not completed on time
• Contradict conclusions reached by higher judge, nevertheless
• Prove (something) to be false
• Prove wrong potato was picked up
• Drive back from river, then use public transport, going north
• Deny having uprooted an underground stem
• An awkward brute to disprove
• Refute undisciplined brute
• Tuber (anag.)
• Refute allegation that truffle was planted upside-down