Borscht veggie (4)
I believe the answer is:
beet
'borscht veggie' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for beet that I've seen before include "An edible root plant" , "Sugar-yielding root" , "The mangelwurzel, for instance" , "Source of food" , "Root used as a source of sugar" .)