Possible Clues:

• Mediterranean capital
• 1896 Olympic Games site
• With 23-Across, where the Hellenic Parliament sits
• Hen sat down in the city
• A time with clucking females in foreign city
• Hellenic city
• City in which 13 Across founded school
• Where to target chicken feed for capital
• Capital letter which is first, followed by second
• Ancient center of philsophy