Related Clues:

• Gloom
• 'Heart of --'
• Nightfall
• Cave feature
• What a nyctophobe fears
• What a full moon mitigates
• Period of no light
• Better to light a candle than to curse it, they say
• Absence of light
• Absence of illumination
• 'Hello . . . . . . . ., my old friend' (Simon and Garfunkel song)
• ''Hello ..., my old friend'' (Simon and Garfunkel song)
• You can't make light of it
• This always is at the end of the day nigh to tea
• No light