Possible Clues:

• Capital bird touring capital city
• City near Thika
• Rich chap restricting publicity linked to international capital
• Capital of Iran changed by witchcraft?
• Uhuru Park locale
• Capital near a game reserve
• Capital of Spain suffering setback after English became old
• Posh type, one keeping affected manner in foreign capital
• City's rain affected bio­diversity
• Manner adopted by toff, one in city