Possible Clues:

• Get to the root of making this pi, perhaps
• Globular food plant
• Hint there's a vessel coming in with food
• Hint about container being for a vegetable
• Fleshy edible white or yellow root
• Radish kin
• Discover, with one representing university later, a root vegetable
• pi ?!
• White root vegetable
• Root Internet Protocol under change of direction