Not shiny (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not shiny</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for matte that I've seen before include "Mask used to record two images on same film" , "Mask used to block out areas of the image in filming" , "A dull finish" , "Mask used in film; ET mat (anag.)" , "Dull, flat" .)
(Other definitions for dull that I've seen before include "Lacking brightness" , "Constable?" , "mat" , "Cloudy or boring" , "Overcast or uninteresting" .)