Related Clues:

• Source of some greens
• Vegetable with round white root
• Plant with round white root used as vegetable
• Fleshy edible white or yellow root
• Rip nut up for a vegetable
• 'Root vegetable, yellow or white (6)'
• Edible white or yellow root
• Root of pi?
• Might the Swede fasten the cart track upside down?
• The root of pi?
• Get to the root of making this pi, perhaps
• The root of pi? That may be how you get to it
• The root of pi
• The way to get to the root of pi?
• Sounds as if one might arrive at the root of this