Possible Clues:

• Seas are concealed by 'aze, we hear, in African port
• Capital - electricity flowing both ways, overcoming resistance
• Current account opened: creditor's invested foreign capital
• A couple of hundred artist has for capital
• The first two hundred painters are capital
• Little measure to the artist in Africa
• Small measure to the artist in Africa
• Capital overlooking the Gulf of Guinea
• Seas are enveloped in 'aze, we hear, making for African port
• What a capital small measure of the end of 16 across!