Basket weaver's material (5)
I believe the answer is:
osier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">basket weaver's material</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 osier that I've seen before include "Willow for making baskets" , "Willow growing shoots used in basketwork" , "Kind of twig used in basketwork" , "branch" , "Willow for basket making" .)