Demolition debris (6)
I believe the answer is:
rubble
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">demolition debris</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 rubble that I've seen before include "Waste fragments of stone or rock, debris" , "Remains of demolished building" , "Bits of demolished building" , "Lose stones" , "Light theatrical show" .)