Possible Clues:

• Table decoration
• Thanksgiving table decoration
• Decoration on a dining table, and what's in the exact middle of each starred clue's answer?
• Pivotal element, and what each word in quotes in the starred clues literally is to its answer?
• Middle-of-the-table decoration
• Arrangement on the table
• Object displayed on a 1 Across
• Cornucopia on Thanksgiving, often