Possible Clues:

• Édouard Manet work
• Old play I'm to adapt for London venue
• Exhibition centre
• Primarily, our London year must prove itself with a historic venue for games
• Toppings of Luigi's Italian pizza dressed with mayo -- or plain?
• Thinking of 'eaven, mum keeping pious and plain
• She provides an endless series of games
• Games there originally
• Ancient Greek games site
• Scandalous 1865 Manet painting