Wattle tree or shrub (6)
I believe the answer is:
acacia
I believe this is a double definition.
'wattle tree' is the first definition.
(I've seen this in another clue)
'shrub' is the second definition.
(I've seen this before)
(Other definitions for acacia that I've seen before include "Wattle genus" , "Garden plant also known as wattle" , "Australian tree" , "Locust tree the false one" , "Plant like wattle" .)