Possible Clues:

• Less hilly; show to advantage
• Do so to deceive when all smoothed out?
• Fawn upon
• Oddly, they're after an apartment that's more on the level
• Use soap and drier
• Large, in having put on weight, but less curvaceous?
• Butter up, say
• Butter up female, second of two
• Large heavier clothes more streamlined
• Compliment excessively