Plant anchorer (4)
I believe the answer is:
root
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plant anchorer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for root that I've seen before include "Origin; eg, carrot" , "Part of plant under the ground" , "support" , "Turn up with the snout." , "Underground part of a plant" .)