Answer:

darkest

Answer	Crossword Clue
DARKEST	.. Africa
DARKEST	Least lit
DARKEST	Most murky

DARKEST	William Booth's "In ... England and the Way Out"
DARKEST	Pre-dawn adjective.
DARKEST	Stanley's adjective for Africa.
DARKEST	It's this before dawn.
DARKEST	Like the hour before dawn.
DARKEST	Pre-dawn status.
DARKEST	Most gloomy.
DARKEST	Like the time before dawn.

DARKEST	Livingston's part of Africa
DARKEST	Word for pre-dawn time
DARKEST	Least promising
DARKEST	Worst, hour-wise
DARKEST	Most dismal
DARKEST	Metal band ... Hour