Possible Clues:

• Balanced zodiac sign?
• One of the air signs
• Virgo follower
• Zodiac sign - The Scales
• One who's diplomatic and urbane, astrologically
• Rehnquist's sign, appropriately
• Only astrological sign with an inanimate symbol
• Sign with the scales
• Pound cut by British Rail, unusually
• Pound's collection of books a couple short