A shade higher than amber? (3)

I believe the answer is:

red

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'a shade' is the definition.
(red is a colour or shade)

I cannot understand how the rest of the clue works.

(Other definitions for red that I've seen before include "Carmine" , "Colour of Merlot wine" , "Glowing" , "See it and become angry" , "eg Cardinal" .)

I've seen this clue in the Evening Standard.

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