Not bright (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not bright</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that dull is the opposite attribute of bright)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dull that I've seen before include "Lacklustre" , "Overcast or uninteresting" , "Lacking in liveliness or animation" , "Uninspiring" , "Dreary" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not bright</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dim that I've seen before include "Vague" , "Opaque, not bright" , "Darken" , "Sombre" , "Slow-witted" .)
(Other definitions for muted that I've seen before include "Muffled, subdued" , "Quietened" , "Kept quiet" , "with reduced volume" , "(Of sound/colour) softened" .)