Related Clues:

• No friend
• Contender for your title
• Adver-sary
• One of ''Them''
• McCoy, to Hatfield
• No ally
• Archrival
• Mailman, to a canine?
• 'This is a Montague, our ___': 'Romeo and Juliet'
• The Joker, to Batman
• Mortal enemy
• One to beat
• Moriarty, to Holmes
• Greek goddess
• Counter person?