Possible Clues:

• Big road's number by French sea -- the label's wrong
• 'Prairie dog' or 'koala bear'
• Skinflint has no money? That's the wrong description
• Flying fox or koala bear, say
• Wrong name for anarchic modernism that hasn't died
• Wrong name ... even though 51-Across doesn't mean the right name
• Cheapskate eats no meat at first — Bombay duck for instance
• The wrong word for it
• Firm is no merchant holding dubious label
• Scrooge's Boxing Day uplifting? That's not the right word