Property of Mrs. Witherspoon (4)

I believe the answer is:

hers

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

'property' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'of mrs witherspoon' is the wordplay.
'of' indicates the answer is hidden within the clue.
'HERS' is hidden within 'mrs witherspoon'.

Can you help me to learn more?

(Other definitions for hers that I've seen before include "The woman's" , "Belonging to the female" .)

I've seen this clue in the Evening Standard.

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