Very stupid (7)
I believe the answer is:
idiotic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">very stupid</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 idiotic that I've seen before include "Witless" , "half-baked" , "Half witted" , "Inviting ridicule" , "Stupid, foolish" .)