Do such potatoes resemble tomatoes? (3)
I believe the answer is:
red
'do' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for red that I've seen before include "- Cross; - admiral" , "Glowing" , "- - poker: Kniphofia" , "Colour of blood" , "Colour of 1 across" .)