Handle art unorthodoxly near Leeton (9)

I believe the answer is:

ardlethan

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

'unorthodoxly near leeton' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'handle art' is the wordplay.
'handle art' anagrams to 'ARDLETHAN'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.