Mat, carpet (3)
I believe the answer is:
rug
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">mat</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">carpet</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that carpet can be written as rug)</span><br/ ><br/ ></span>
(Other definitions for rug that I've seen before include "Mat - blanket" , "wrap" , "Thick mat" , "Wig (facetious)" , "Hairpiece" .)