Wattle (6)
I believe the answer is:
acacia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wattle</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)