Take apart (9)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take apart</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 undo that I've seen before include "Loosen or reverse" , "Cancel - destroy" , "Bring to nought" , "Loosen; annul" , "Remove the wrapping" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take apart</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dismantle that I've seen before include "Unrig" , "To demolish" , "Take to pieces" , "strike" , "Strip down" .)