Brides cleared up the remains (6)
I believe the answer is:
debris
'the remains' is the definition.
(I've seen this before)
'brides cleared up' is the wordplay.
'brides' anagrams to 'DEBRIS'.
However, I am unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for debris that I've seen before include "Brides among rubble" , "Brides with pieces of rubble" , "Scattered remains" , "Rubble, heap of broken pieces" , "Rubble, detritus" .)