Reveal dancing dresses and originally rejected shade of purple (8)
I believe the answer is:
lavender
'purple' is the definition.
(I have seen 'Pale purple' mean 'lavender' so perhaps 'purple' could also mean 'lavender')
'reveal dancing dresses and originally rejected shade of' is the wordplay.
'dancing' indicates anagramming the letters.
'dresses' means one lot of letters goes inside another (some letters are contained by or dressed in others).
'and' becomes 'n' (common abbreviation for 'and').
'originally rejected shade of' becomes 'd' (I am not sure about this - if you are sure you should believe this answer much more).
'reveal' is an anagram of 'laveer'.
'n'+'d'='nd'
'laveer' going around 'nd' is 'LAVENDER'.
Can you help me to learn more?
(Other definitions for lavender that I've seen before include "Shrub with fragrant blue flowers" , "it should smell nice" , "Fragrant purple flower used to scent linen etc" , "Fragrant, blue-flowered shrub" , "Plant used in perfumery" .)