Possible Clues:

• Largest city and former capital of Nigeria
• Most populous African city
• Port on the Gulf of Guinea: its country's capital until 1991
• Gallons stored in Asian country port
• Nigerian capital, once
• Like this young lady from East African port
• The Spanish besieging a grand old African capital
• Nigerian city and port
• Burial place of Afrobeat legend Fela Kuti
• Seaman faced with delay in foreign port