Possible Clues:

• City that ancient Greeks called Philadelphia
• In the morning fellow is found in capital city
• World capital with the historic Temple of Hercules
• Mideast capital once known as Philadelphia
• Zarqa River city
• Jordanian city once known as Philadelphia
• Mideast capital once named Philadelphia
• Capital that's the site of the king's Raghadan Palace
• Fellow’s got under a million in capital
• A capital f-fellow in Jordan?