borscht vegetable (8)
(Other definitions for beetroot that I've seen before include "Essential ingredient in borsch" , "salad ingredient" , "vegetable's produced" , "Vegetable cooked or used in salads and pickles" , "Dark red root eaten as a vegetable" .)
'borscht vegetable' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for beet that I've seen before include "Sugar-yielding root" , "Source of food" , "An edible root plant" , "Plant grown for sugar" , "Crop plant, sugar source" .)