Possible Clues:

• Novice with crazy money produces tart flavour
• It's the French bread, not English, that's sour
• Like a 20-Across in flavor, perhaps
• Sharp needle — no need for it, day surgery's ending
• Tart-tasting, perhaps
• Author Snicket
• Sharp line taken on funny money
• Tart and citrusy
• Having a tart, citrusy flavor
• The Parisian going to Missouri and New York could be fruity!