Traditional application for a Hindu wedding (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
henna
(Other definitions for henna that I've seen before include "A shrub, its red dye" , "Cosmetic plant dye" , "Red-brown plant dye" , "Shrub used for cosmetic colouring" , "Type of dye" .)