Computer accessory (5,3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">computer accessory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mouse mat that I've seen before include "Computer accessory" , "A surfer may use it" .)
(Another definition for mousepad that I've seen is " that's for making points".)