Growing anger? (6)
I believe the answer is:
nettle
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">growing</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">anger?</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for nettle that I've seen before include "Stinging plant; annoy" , "Annoy; common weed" , "Irritate, annoy" , "urticaceous plant" , "Plant to irritate" .)