Possible Clues:

• Type of roughage
• What white flour lacks
• Oat, wheat or rye, e.g.
• Have it to eat on a dish and wave it around
• Refuse to add name to garment
• Type of healthy cereal
• Layer outside the germ
• Lad leaving Virgin boss shows fibre
• Food from the husks of cereal grains
• It's in whole wheat