Spurge genus (9)
I believe the answer is:
euphorbia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spurge genus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for euphorbia that I've seen before include "flower" , "shrub" , "Plant of the spurge genus" , "flowering plant" , "poinsettia" .)