New son bears aristocratic title (8)

I believe the answer is:

baroness

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'aristocratic title' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'new son bears' is the wordplay.
'new' is an anagram indicator.
'son'+'bears'='sonbears'
'sonbears' anagrammed gives 'BARONESS'.

Can you help me to learn more?

(Other definitions for baroness that I've seen before include "Lady Thatcher?" , "Aristocrat" , "Female life peer" , "Peer's title" , "Lady peer" .)

I've seen this clue in The Times.

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