Possible Clues:

• Collapsible topper
• Collapsible headgear
• Collapsible silk headgear
• Accessory seen in a loge
• Collapsible lid
• Collapsible headwear
• The flying Dutchman goes on ahead with topper
• Tall topper
• What surgeon does mostly without a hot garment in theatre?
• Headgear to hear 14dn