The region of SE England (but it's at Harrow, surely?) (5)

I believe the answer is:

weald

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'the region' is the definition.
(weald is a kind of region)

I don't understand the rest of the clue.

(Other definitions for weald that I've seen before include "ancient woodland" , "wooded area" , "Area of open or forested country" , "Area of SE England" , "The ___, area between the North and South Downs" .)

I've seen this clue in the Evening Standard.

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