Related Clues:

• ''Lights out'' signal
• Cemetery poem
• Nominates
• Remembrance speech
• Song at a military funeral
• Bugler's bedtime tune
• Base music
• Knocks lightly
• Base number
• Tune with only four distinct notes
• It's bugled on a base
• Grave words?
• Eavesdroppers' equipment
• Milton's "Lycidas," e.g.
• Melancholy composition