Not enjoying A Study in Scarlet ? (3)
I believe the answer is:
red
'scarlet ?' is the definition.
(scarlet is a kind of red)
I don't 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 "See it and become angry" , "- Cross; - admiral" , "Colour for a blusher" , "- - poker: Kniphofia" , "- Cross; - carpet" .)