Possible Clues:

• Kitchen tool
• Gadget scraped on a peel
• Gadget used with lemons
• Buffoon Jack's unsettled by unknown kitchen utensil
• Gadget used on a lemon
• Kitchen assistant perhaps glazes terrine partly
• Gadget for lemons
• Gadget used for grating citrus fruit
• Peel-scraping tool
• Lemon-peeling utensil