Related Clues:

• 'A madness most discreet,' per Romeo
• Popular topic with lyricists
• Sweetheart's emotion
• Lyricist's subject, often
• Troubador's topic
• "All You Need Is ___"
• Zero score (it's all you need)
• It means nothing to Andy Murray
• Certain human drive
• 2/14 sentiment
• It means nothing at Arthur Ashe Stadium
• Affectionate valediction
• 'A game that two can play and both win': Eva Gabor
• Sweet nothing, passion about right
• '___ is composed of a single soul inhabiting two bodies': Aristotle