Related Clues:

• Sir's companion
• 'Just the facts, ___'
• Bro's foe, at times
• Lady of honor
• "Just the Facts, ___" (Webb biography)
• Sibling, for short
• Family moniker
• One often thanked?
• Relative apt for 61-Across
• "Dear" letter addressee
• Nickname within the family
• Feminine address
• Palindromic relative
• Jo, to Meg
• "Just the facts, ___"