Seamster (5)
I believe the answer is:
sewer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">seamster</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sewer that I've seen before include "Large pipe for carrying waste matter" , "Disposal outlet" , "One stitching - discharge channel" , "Needlewoman" , "Channel to carry away waste water and matter" .)