Possible Clues:

• More or less how old is this dietary fibre?
• Witch wearing make up perhaps important element of diet
• Unpleasant period having fibre to eat
• Indigestible fibre
• This food's indigestible — that's as much as a lady will admit?
• Coarse stuff witch squeezed into powder
• Fibre, and estimate of how long it's been around?
• Coarse food and wine's consumed hot, almost mellow
• Hard time obtaining dietary fibre
• It aids digestion if having hard time