Crossword Genius

Colour forming a literary hero with 3D (7)

Ross

I believe the answer is:

scarlet

(Other definitions for scarlet that I've seen before include "Miss O'Hara appearing briefly" , "Bright red of clarets" , "Cartels (anag.)" , "Vivid red" , "Fallen" .)

I've seen this clue in The Times.
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