Debris, littered...
litter
Litter is a six letter word for scattered rubbish.
litter
Litter.
Debris.
Rubbish
The word you get by rearranging the letters in "BRIDES," which fits the clue of "scattered rubbish or ruins," is " debris."
derbis
Litter
Jkol
The answer is debris when brides is rearranged.