Possible Clues:

• Saks __ Avenue
• Elegant Manhattan avenue
• Numerically, 63-Across' C-minor 39-Down
• Liquor-bottle size
• ____ Business, by R. Davies
• What's taken in some court proceedings, and also (in two ways) from the answers to starred clues
• - Column is a group working for the enemy
• 20 per cent
• Whiskey bottle capacity
• It may be taken in court (with "the")