Where land has value (9)

I believe the answer is:

isleworth

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

'land has value' is the wordplay.
'land' becomes 'isle' (isle is a kind of land).
'has' is a charade indicator (letters next to each other).
'value' becomes 'worth' (I've seen this before).
'isle'+'worth'='ISLEWORTH'

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