City in Mali considered very far away (8)
I believe the answer is:
timbuktu
(Other definitions for timbuktu that I've seen before include "Town in Mali used as a metaphor for a distant place" , "Any distant or outlandish place (in Mali?)" , "Mythical faraway place (in Africa?)" , "remote location" , "'City in Mali, once famous for its gold trade (8)'" .)