Related Clues:

• Two
• Bonnie & Clyde, for one
• Company of performers
• See 43-Across
• Donizetti's 'Tornami a dir che m'ami,' e.g.
• Collaborative work
• Trio minus one
• Small group
• Simon and Garfunkel, once
• Batman and Robin are a dynamic one
• Deuce
• Song for two
• Tune for two
• Two of a kind
• It may call for four hands