Related Clues:

• Kind of code at some schools
• Rebuke (with "down")
• Formal
• Suit yourself?
• Boutique buy, perhaps
• Bride's pride
• Togs
• Don duds
• Prep, as turkeys
• Get decent
• Get into gear?
• Put on clothes
• Garment
• Diane von Fürstenberg piece
• Muumuu, e.g.