Related Clues:

• Busts inside a museum
• Vaccine variety
• Gallery display
• Kind of defense
• Vaccine type
• Unwritten exam
• Dance, e.g.
• Pencilless exam
• Like most testimony
• Pastels, e.g.
• Homophone of 15-Across
• Louvre collection
• Thermometer type
• Frick collection
• It may be abstract