Related Clues:

• 'Revolution,' to 'Hey Jude'
• No-hit performance?
• Part of a 45
• Less-played 45 part
• Part of an LP
• Improbable hit
• Less popular song on a single, usually
• Back of a hit single
• Single half
• Reverse of a hit 45 record
• Audiotape's other half
• Less promising of two songs
• Wax half
• Lesser-played half of a 45
• 45's back