Crossword Genius

I’ll be enthralled by something that makes you go brown (6)

Ross

I believe the answer is:

sienna

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

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(Other definitions for sienna that I've seen before include "Earthy paint pigment" , "Medieval Tuscan city" , "Brownish-yellow substance used as pigment" , "rusty" , "reddish brown" .)

I've seen this clue in The Independent.
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