Temporary tattoo dye (5)
I believe the answer is:
henna
'temporary tattoo dye' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for henna that I've seen before include "Vegetable dye" , "Hair/skin dye" , "Reddish-brown dye from shrub leaves" , "Red hair dye" , "Stainer" .)