Internal framework (8)
I believe the answer is:
skeleton
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">internal framework</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 skeleton that I've seen before include "The smallest possible number" , "one doesn't want found in cupboard" , "Bodily framework" , "Body's framework" , "Basic frame" .)