Related Clues:

• Formal dress
• Jacket accompanier
• Concern of some codes
• Kind of code at some schools
• Cloak
• Rebuke (with "down")
• Formal
• Third piece
• Endow
• Vestments, e.g.
• Suit yourself?
• Suit piece
• Jerkin
• Dress-code concern
• Boutique buy, perhaps