Old socialite facing endless danger? Rubbish! (6)
I believe the answer is:
debris
'rubbish' is the definition.
(I know that debris is a type of rubbish)
'old socialite facing endless danger?' is the wordplay.
'old socialite' becomes 'deb' (old-fashioned slang for debutante).
'facing' says to put letters next to each other.
'endless' means to remove the last letter.
'danger?' becomes 'risk' (synonyms).
'risk' with its last letter removed is 'ris'.
'deb'+'ris'='DEBRIS'
(Other definitions for debris that I've seen before include "Fragments of wreckage" , "Brides (anag) - bits and pieces" , "'Ruins, rubble (6)'" , "Remains - wreckage" , "Evidence of destruction" .)