Possible Clues:

• African city, converting oxygen to energy, turned Portuguese, say
• In spa in here
• English overcome by one King of Ireland, and of Spain and Portugal
• Be entering tax office with Scotsman or Southern European
• Spa in from there
• Russian, without capital, of an European area
• Person from Spain or Portugal
• Could I bear to get in for 15 across?
• Native of a European peninsula
• African heading off south of the Pyrenees