Possible Clues:

• It''s not bound to sell
• Use them in composition, so it's notepaper
• Printed notepaper?
• Accompanist's reference
• Found in bed with Shakespeare's food of love? This will make sense to musicians!
• Leaves with scores the miscues ruined
• Will need to be composed, as someone could be sleeping on this swing
• Miscues the (anag) – player's guide
• What a cellist reads
• Score for an instrumentalist