Possible Clues:

• One done up like a kipper?
• With audacity, draw garment
• Item of (American) clothing
• Garment typically for a man
• Item worn round collar (mainly US)
• Upscale restaurant requirement, maybe
• Cup match on the isthmus could be a formality
• Nike etc. (anag.)
• Business wear
• Formal wear for highly informal sort of party