Related Clues:

• Pair of boxers?
• Pair of blows
• "Old" punches?
• Combo punch
• Boxer's punch sequence
• Jab-cross pairing
• Fight combo
• 9 across
• What went between the round made the dozen
• Sounds as if a single 27 across might come to twelve
• One might make a dozen of this
• That makes a dozen
• How a single brace might make twelve
• Twelve?
• Single pair or twelve