The color of silence? (6)
I believe the answer is:
golden
'the color of silence?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for golden that I've seen before include "Most favourable; bright" , "Colour of the fleece sought by Jason" , "In Woodstock we are this" , "- - handshake" , "'The silver apples of the moon / the . . . . . . apples of the sun' (Yeats)" .)