Related Clues:

• Cardinal, say, is back holding a letter-opener
• ''__ Sir or Madam . . .'' (letter starter)
• Highly valued ruminant animal discussed
• Much valued
• Common first word in a letter
• More than it's worth, sweetheart
• "___ John" (Taylor Swift song)
• Expensive source of venison reported
• Word before "Abby" or "John"
• Netflix's "__ White People"
• First word in some emails
• Affectionate sobriquet
• First word in a 13-Across
• Near and ___ to my heart
• Beloved costing a lot of money