Scattered pieces of rubble (6)
I believe the answer is:
debris
'scattered pieces of rubble' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for debris that I've seen before include "Brides among rubble" , "aftermath of wild reception?" , "Brides (anag) - bits and pieces" , "Scattered remains" , "Fragments of rubbish" .)