Possible Clues:

• Clubber gazed around, taking in Croatian capital
• South African bird with no tail
• Capital of South Africa with tailless bird
• National capital since 1991
• Aquatic bird mostly found by South Africa's capital
• Sharp movement relating to billion in capital
• Split state's capital
• New zebra crossing good in capital
• Turns up, graduate swallowed bit of work map in capital city
• Croatian city