Small rug (3)
I believe the answer is:
mat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small rug</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mat that I've seen before include "Thick flat pad on the floor" , "Not glossy" , "Rough piece of floor-covering" , "Small rug" , "To wipe your feet on" .)