Silver-haired poet mentioned in speech (4)
I believe the answer is:
grey
'silver' is the definition.
(similar in meaning)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(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" .)