Related Clues:

• Memorial Day performance
• Composition of only four different notes
• Twilight tune
• Gets the keg rolling
• It's played nightly on base
• Army ''good-night'' tune
• Beasts with prominent snouts
• 'Lights out' music
• "Lights out" music
• Restin' piece?
• Light hits
• Bugler's goodnight
• Knocks softly
• Military lights-out tune
• Doesn't pound hard