Ornamental climber (8)
I believe the answer is:
clematis
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ornamental climber</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 clematis that I've seen before include "Climber's" , "Old man's beard" , "Ornamental climber" , "Garden climber" , "bloomer" .)