Verdant places where wild boars roam around an ancient city (7)

I believe the answer is:

arbours

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

'verdant places where wild' is the definition.
I can't tell whether this definition defines the answer.

'boars roam around an ancient city' is the wordplay.
'roam' is an anagram indicator (I've seen 'roaming' mean this).
'around' is an insertion indicator.
'an ancient city' becomes 'ur' (ancient Sumerian city state).
'boars' with letters rearranged gives 'arbos'.
'arbos' going around 'ur' is 'ARBOURS'.

Can you help me to learn more?

(Another definition for arbours that I've seen is " Frameworks supporting climbing plants".)

I've seen this clue in the Evening Standard.

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