Crossword Genius

London location of a number of trees (4,4)

Ross

I believe the answer is:

nine elms

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'london location' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'a number of trees' is the wordplay.
'a number' becomes 'nine' (nine is a number).
'of trees' becomes 'elms' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'nine'+'elms'='NINE ELMS'

'of' acts as a link.

Can you help me to learn more?

(Another definition for nine elms that I've seen is " part of Wandsworth - with 25d".)

I've seen this clue in the Evening Standard.
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