Save your son for noblewoman (8)

I believe the answer is:

baroness

'for noblewoman' is the definition.
(baroness is a kind of noblewoman)

'save your son' is the wordplay.
'save' becomes 'bar' (I've seen this before).
'your' becomes 'ones' (I've seen this in other clues).
'son' becomes 's' (genealogical abbreviation for son).
'bar'+'ones'+'s'='BARONESS'

(Other definitions for baroness that I've seen before include "Peer's title" , "Woman life-peer" , "Aristocrat" , "Female life peer" , "Noblewoman" .)

I've seen this clue in The Guardian.

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