Possible Clues:

• Blue eyes or dark hair, e.g.
• A characteristic of straitened kind
• Feature of restaurant I visited
• Red hair, e.g.
• Brown eyes or blond hair, e.g.
• Only a trace of the sound carrier, and that's flat
• Something bred for
• Characteristic sound made by three in pack
• Attribute loss of soldiers to fifth columnist
• Common characteristic