Related Clues:

• Helvetian
• Deli selection
• Bern citizen
• What nyctophobes fear
• Kind of Guard or chard
• Like a moonless night
• Like Heidi
• Not currently in use, as a theater
• Murky
• Like some chocolate and cheese
• Not illuminated
• Sandwich cheese
• Sombre
• Euler, for one
• With 28-Across, a Hogwarts class