Society girl upset titled gent? Rubbish! (6)

I believe the answer is:

debris

I'm a little stuck... Click here to teach me more about this clue!

'rubbish' is the definition.
(I know that debris is a type of rubbish)

'society girl upset titled gent?' is the wordplay.
'society girl' becomes 'deb' (I've seen this before).
'upset' says the letters should be written backwards.
'titled gent?' becomes 'sir' (a man may be addressed as sir. I am not sure about the 'titled' bit.).
'sir' back-to-front is 'ris'.
'deb'+'ris'='DEBRIS'

Can you help me to learn more?

(Other definitions for debris that I've seen before include "Scattered rubbish" , "Evidence of destruction" , "Brides (anag) - bits and pieces" , "Remains - wreckage" , "Brides among rubble" .)

I've seen this clue in The Times.

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