Part of climbing plant (7)
I believe the answer is:
tendril
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of climbing plant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tendril that I've seen before include "Twining shoot" , "Climbing plant's gripper" , "Climbing plant's supporter" , "Climbing plant's grasper" , "Feature of plant" .)