Trees oft hewn in Hants? (3,3,6)

I believe the answer is:

the new forest

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

'in hants?' is the definition.
(forest in Hampshire aka Hants)

'trees oft hewn' is the wordplay.
'trees oft hewn' can be anagrammed to 'THE NEW FOREST'.
But, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Another definition for the new forest that I've seen is " in Hampshire?".)

I've seen this clue in The Guardian.

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