Ropemaking fiber
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ropemaking fiber</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 abaca that I've seen before include "plant fibre" , "Manila hemp" , "Hemp plant" .)