Plant specialist
I believe the answer is:
botanist
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plant specialist</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 botanist that I've seen before include "Scientist who studies plants" , "Expert in study of plants and trees" , "To sit ban out for expert in study of plants" , "Plant studier" , "Someone studying plants" .)