Beet's color (3)
I believe the answer is:
red
'beet's color' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for red that I've seen before include "Left-wing" , "Bordeaux claret, for instance" , "Colour of Merlot wine" , "Blushing" , "Stop light" .)