Possible Clues:

• It may make you 29-Across
• Something to take and 'make it better,' in the Beatles' 'Hey Jude'
• Dirge
• Blues tune, for example
• Tuneful tearjerker
• Melancholy mood music
• Low number?
• Number of tears?
• 'Last Kiss' or 'Tell Laura I Love Her'
• Elegy, e.g