Related Clues:

• Deny having uprooted an underground stem
• Refute undisciplined brute
• Tuber (anag.)
• Refute allegation that truffle was planted upside-down
• Deny the potato, for instance, is making a comeback
• Refute objection by engineers
• Potato put over counter
• Squash potato that's served up
• Provide argument against beginning to run train system in reverse
• Deny dug up potato
• Counter at the bar
• Disprove conclusions in either case, nevertheless
• Go second in a debate
• Argue the opposing viewpoint
• Disprove by putting potato back