Society girl meeting retired teacher? Rubbish! (6)
I believe the answer is:
debris
'rubbish' is the definition.
(I know that debris is a type of rubbish)
'society girl meeting retired teacher?' is the wordplay.
'society girl' becomes 'deb' (I've seen this in another clue).
'meeting' says to put letters next to each other.
'retired' shows that the letters should be reversed in order.
'teacher?' becomes 'sir' (way of addressing a male teacher).
'sir' written backwards gives 'ris'.
'deb'+'ris'='DEBRIS'
(Other definitions for debris that I've seen before include "Rubble, heap of broken pieces" , "Scattered remains" , "Brides (anag) - bits and pieces" , "Broken remains" , "Scattered rubbish" .)