Used to draw assorted petals. (6)
I believe the answer is:
pastel
'used to draw' is the definition.
I can't judge whether this defines the answer.
'assorted petals' is the wordplay.
'assorted' indicates an anagram.
'petals' with letters rearranged gives 'PASTEL'.
Can you help me to learn more?
(Other definitions for pastel that I've seen before include "Staple light colour" , "Pleats of a light colour" , "Chalky crayon" , "Crayon - of soft shades" , "pigments mixed with gum" .)