Cashew cousin (5)
I believe the answer is:
sumac
'cashew cousin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sumac that I've seen before include "Spice" , "Rudely brief" , "Shrub colourful in Autumn" , "purchase from garden centre?" , "Hairy-fruited rhus" .)