Related Clues:

• "An ___ of the People" (Ibsen)
• Old enemy
• Foe hiding, in a way, in the puzzle's four longest answers
• Ill-wisher
• The Axis, to the Allies
• Hatfield, to a McCoy
• Unconquerable foe
• The FBI, to the mob
• Them, with "the"
• Greek goddess of retribution
• Hostile person, foe
• Cheery man can be greatest foe
• Foe, adversary
• Goddess of retribution in Greek mythology
• Cheery man may be chief opponent