Related Clues:

• Wine bottle datum
• Ampersand follower, often
• Oenologist's interest
• Class identification
• Ham, to Noah
• End of some company names
• Kind of book
• Roughly one of every two deliveries
• Once around the sun
• Lohengrin, to Parsifal
• Astronomical unit
• Heir perhaps,
• "Native ___" (Richard Wright novel)
• II or III, say
• "Sanford and ___"