Crossword Genius

Silver-haired poet mentioned in speech (4)

Ross

I believe the answer is:

grey

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'silver' is the definition.
(similar in meaning)

I cannot understand how the rest of the clue works.

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(Other definitions for grey that I've seen before include "Colour of ashes" , "Old - colourless" , "Neutral tone between black and white" , "9 colour" , "Aged; cloudy" .)

I've seen this clue in The Times.
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