Rubble (6)
I believe the answer is:
debris
'rubble' is the definition.
(synonyms)
This is all the clue.
(Other definitions for debris that I've seen before include "Brides (anag) - bits and pieces" , "Rocky fragments" , "Detritus, rubbish" , "Brides among rubble" , "Rubble, detritus" .)