Former West African capital (5)
I believe the answer is:
lagos
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">former west african capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lagos that I've seen before include "Former Nigerian capital" , "African port" , "Chief port and former capital of Nigeria" , "Nigerian city and port" , "Largest city and once capital of Nigeria" .)