Possible Clues:

• Piteous asides about being fat
• Relish opening a huge English paper that's 16
• Princess turns up with model — backup model, female, carrying some fat
• Vesicular structure in animals containing fat
• Model sitting in passage given discharge - too much of this?
• Fat? A girl asks another about this regularly
• Feature of obesity due to pies, as is possible
• All fat, but thin at last