Related Clues:

• With 37-Across, fall of Rome aftermath, and a hint to the puzzle theme
• 1 across the origin of light and dark
• Like grim humor
• Died on boat? That's not fair
• Lacking street lamps, say
• Hard to see in, at times
• Like the dark rooms of any house
• Dancing until dark
• Like yin but not yang
• Dark lake flanked by group of soldiers
• What nyctophobia is the fear of
• Dark lake surrounded by military group
• Talk Radio is holding back secret
• Without lights
• Of a sombre colour