Aromatic shrub (8)
I believe the answer is:
lavender
'aromatic shrub' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lavender that I've seen before include "Mauve flower, cultivated for its fragrant oil" , "Pale purple" , "Light bluish-purple" , "Plant with aromatic mauve flowers" , "Shrub with fragrant blue flowers" .)