Petals possess such shades (6)
I believe the answer is:
pastel
'shades' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'petals possess' is the wordplay.
'petals' can be anagrammed to 'PASTEL'.
However, I'm not clear how this is indicated.
'such' acts as a link.
Can you help me to learn more?
(Other definitions for pastel that I've seen before include "Delicate colour found in plates" , "Chalk-like crayon" , "Soft shade (of a colour)" , "Of a colour, subtle" , "Pleats of a light colour" .)