Woman returned an Oriental shrub (5)
I believe the answer is:
henna
'oriental shrub' is the definition.
'woman returned an' is the wordplay.
'woman' becomes 'hen' (**).
'returned' is a reversal indicator.
'an' written backwards gives 'na'.
'hen'+'na'='HENNA'
(Other definitions for henna that I've seen before include "Red-brown dye used for body decorations" , "Pigment used on skin" , "Cosmetic plant dye" , "(Shrub producing) reddish dyestuff" , "Type of dye" .)