Coast of Africa once creamy white (5)
I believe the answer is:
ivory
I believe this is a double definition.
'coast of africa once' is the first definition.
(Cote d'Ivoire is the official name of Ivory Coast)
'creamy white' is the second definition.
(I've seen this before)
(Other definitions for ivory that I've seen before include "on either side of trunk" , "Elephant tusk material" , "Yellowish white - material from tusks" , "Jumbo's dentine" , "Film director" .)