Crossword Genius

Old queen is turning brown (6)

Ross

I believe the answer is:

sienna

'brown' is the definition.
(I've seen this before)

'old queen is turning' is the wordplay.
'old queen' becomes 'anne' (Queen Anne).
'turning' says the letters should be written backwards.
'anne'+'is'='anneis'
'anneis' backwards is 'SIENNA'.

(Other definitions for sienna that I've seen before include "Yellow-brown clay used in paint pigments" , "Raw -; burnt -" , "Yellow-brown pigment" , "Medieval Tuscan city" , "Earthy colour" .)

I've seen this clue in The Guardian.
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