Cassia (5)
I believe the answer is:
senna
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cassia</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 senna that I've seen before include "given help to get in motion?" , "purgative's needed" , "He drove fast" , "Cassia tree, laxative" , "It produces pods" .)