Ribbon of quiet deep colour (5)
I believe the answer is:
shred
'ribbon' is the definition.
(thesaurus)
'quiet deep colour' is the wordplay.
'quiet' becomes 'sh' (both can be said to tell someone to be quiet).
'deep colour' becomes 'red' (red is a kind of colour. I am not sure about the 'deep' bit.).
'sh'+'red'='SHRED'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for shred that I've seen before include "Torn-off fragment" , "Tiny amount" , "Tear into scraps" , "Snippet" , "Dispose of" .)