Possible Clues:

• The month's weather forecast for the London area
• Prosperous part of our capital market after part of year
• Reasonable support for month in property of 15
• Wealthy London district
• One month, just, in London area
• Affluent central London neighbourhood
• Root around area in wood, part of London
• Area of London's West End
• Couple of 15s surrounding a Monopoly area
• Blossom yellowish in London thoroughfare