Related Clues:

• Vinylphiles flip for it
• Single record's lesser song
• It may be a sleeper hit
• “We Will Rock You,” vis-à-vis “We Are the Champions”
• Queen's "We Will Rock You," e.g
• Lesser number?
• Back half of a record
• Back half of a 45
• The Beatles' "P.S. I Love You," e.g
• Record's less popular half, often