Possible Clues:

• Dressing base
• Salad dressing component
• Condiment that may be given a shaking before starter in restaurant?
• “A spoonful of honey will catch more flies than a gallon of ____” (Poor Richard’s Almanack)
• Source of grapes, fish and sour-tasting liquid
• Condiment given a shaking, right?
• Pickling liquid
• Vigor (sic) in volume in vogue upset
• Condiment very popular with English on fish
• Storm about backing foreign plonk, sour stuff