Wattle (6)
I believe the answer is:
acacia
'wattle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for acacia that I've seen before include "Australian shrub" , "Spiny tree of warm climates" , "Flowering tree/shrub of Australia and Africa" , "flowering plant" , "Garden plant also known as wattle" .)