Related Clues:

• It melts in your mouth
• Promise, e.g.
• See 50-Across
• It may be laid on thick
• Salad dressing ingredient
• Butter alternative
• Bogus butter
• Toast topping
• Deep-frying need
• Dairy aisle buy
• Lubricate
• Refrigerator bar?
• Pepper's partner
• Tanker's cargo
• Van Gogh's 'Irises,' e.g.