Wall climber (4)
I believe the answer is:
vine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wall climber</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for vine that I've seen before include "Fruiting climber" , "Climbing plant that needs support" , "Plant producing grapes" , "Climbing fruiting plant" , "Climbing, twining plant" .)