Plant fibre used for making rope (5)
I believe the answer is:
sisal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plant fibre used for making rope</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 sisal that I've seen before include "Type of fibre" , "Fibre from agave plant" , "material for painter, say?" , "Plant fibre used for making rope" , "Plant fibre used to make string" .)