Related Clues:

• 'Beauty and the Beast,' e.g.
• Puccini's 'O Mimi, tu più non torni' e.g.
• One may be an item
• Inseparable twosome
• "I Got You Babe," e.g.
• Tango team
• Team minimum
• "Cinque, dieci, venti, trenta" in "The Marriage of Figaro," e.g.
• Small team
• Many a '50s-'60s pop act
• Smallest possible band
• Rock's No Age, e.g.
• Tune for four hands
• Piece for a pair
• A twosome