Like silence or those grand days of yore (6)
I believe the answer is:
golden
'like silence' is the definition.
(I've seen this in another clue)
'grand days of yore' is the wordplay.
'grand' becomes 'g' (G is short for grand as in a thousand).
'days of yore' becomes 'olden' (I've seen this in another clue).
'g'+'olden'='GOLDEN'
'or those' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for golden that I've seen before include "Very favourable (opportunity); aureate" , "Gilded, pale yellow" , "Autumnal flower" , "- - wedding (50th)" , "Colour of the fleece sought by Jason" .)