Possible Clues:

• West London exhibition centre, now demolished
• Noblemen curry favour in exhibition centre
• More than one nobleman has his residence in this London district
• Special ruler's coat seen in exhibition centre
• Where in London the nobility play tennis?
• Exhibition hall dispenses sour claret
• Car's route diverted round front of London tube station
• Exhibition centre in London
• Is this where one might peer at the judges in London? (5, 5)
• With both hands clean, dine out in part of London