Event for women with 50 per cent reduction on a beauty product (5)
I believe the answer is:
henna
'product' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for henna that I've seen before include "Dye used in skin decoration" , "hair colour?" , "(Shrub producing) reddish dyestuff" , "Natural hair dye" , "Red-brown plant dye" .)