Related Clues:

• Ceremonial garb
• Red-carpet raiment
• Subject of interest in the question 'Who are you wearing?'
• Order for Oscar night
• Oscar night attire
• A train may follow it
• Graduate garb
• Formal frock
• Prom purchase
• Prom dress
• Sari
• Graduate's garment
• Academic's robe
• Bridal attire
• It's often seen under a cap