Foreign brides? Rubbish (6)
I believe the answer is:
debris
'rubbish' is the definition.
(debris is a kind of rubbish)
'foreign brides?' is the wordplay.
'foreign' is an anagram indicator (foreign order of the letters).
'brides' is an anagram of 'DEBRIS'.
(Other definitions for debris that I've seen before include "Scattered wreckage" , "Detritus, rubbish" , "Scattered broken pieces, rubble" , "Brides (anag) - bits and pieces" , "'Ruins, rubble (6)'" .)