Possible Clues:

• "I Loves You, Porgy" and others
• 74-Across numbers
• Tenor-soprano combos, e.g.
• Sonny and Cher songs
• Musicians' subs paid in time
• Over time, subscription concert items you and I might perform
• Musicians' boss comes back full of energy
• Sonny and Cher songs, e.g.
• Simon and Garfunkel performances
• Vehicles for two players get ordered a year from 11