Related Clues:

• Adversary's vocal imitation
• Speak of false friend never!
• Friends of the Earth's opponent?
• The enemy love wearing iron
• Enemy leader of old, iron-clad?
• Someone opposing environmentalists
• Coetzee's first fictional offering exceptional? He is opposed
• Archaic 'Curses!'
• Mothra or MUTO, to Godzilla
• Anti matter?
• Enemy coming from eastern Foreign Office first
• Enemy force ignoring Red Cross
• Rival fooled in odd places?
• The Red Baron, to Snoopy
• Aaron Burr, to Alexander Hamilton, at least that one time