Related Clues:

• Pentagon worry
• Arch rival
• Other side
• Opposing force
• It may require several drafts
• Word in a Graham Greene title
• Opposing side
• Agent type
• Group to attack
• Friend's opposite
• Shooting target?
• Ibsen's "An ___ of the People"
• One on a Nixon list
• Hostile one
• Paper airplane, e.g.?