Sailcloth (6)
I believe the answer is:
canvas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sailcloth</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 canvas that I've seen before include "Cloth for painting etc" , "Fabric for sail, tent and painting" , "Woven fabric for sails and tents" , "Sail material" , "Cloth used for tents, sails etc" .)