Related Clues:

• Batman and Robin, e.g.
• Music for two
• Twosome
• Brace
• Piece for two
• See 47-Across
• Husband and wife, e.g.
• Tonto and the Lone Ranger
• Piano-violin piece
• Puccini's 'Flower ___'
• 'Up Where We Belong,' for one
• Couple
• Laurel and Hardy, e.g.
• Pair
• Decimal starter