Related Clues:

• Thickened underground stem
• Eg, dahlia root
• (Dahlia) root
• The root in retrospect of rejecting Pi?
• Large yellow or white edible root
• Swede: 'I go before end of cup'
• Hint there's a vessel coming in with food
• Vegetable staple, furrow's turned over
• Brute (anag.)
• Fleshy underground plant stem
• Round swollen part of plant that grows below the ground
• Rotate one vegetable, so to speak, for another
• Over in Germany, after beginning to take root
• Vegetable staple perhaps, with furrow turned over
• Discover, with one representing university later, a root vegetable