Broad strip or area (5)
(Another definition for swath that I've seen is " cut in field".)
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">broad strip</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">area</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Broad area ' mean 'swathe' so perhaps 'area' could also mean 'swathe')</span><br/ ><br/ ></span>
(Other definitions for swathe that I've seen before include "row after reaping" , "An enveloping bandage" , "Broad strip (land)" , "Cover" , "Wrap; a cut strip" .)