Doctor learn about English leaving Asian capital? (4,5)

I believe the answer is:

ulan bator

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

'asian capital?' is the definition.
'Ulan Bator' can be an answer for 'capital?' (capital of Mongolia). I'm not sure about the 'asian' bit.

'doctor learn about english leaving' is the wordplay.
'doctor' is an anagram indicator.
'english' becomes 'e' (abbreviation).
'leaving' is a deletion indicator.
'learn'+'about'='learnabout'
'learnabout' with 'e' removed is 'larnabout'.
'larnabout' is an anagram of 'ULAN BATOR'.

Can you help me to learn more?

(Other definitions for ulan bator that I've seen before include "Capital of Mongolia" , "eastern city" , "Mongolian city" , "capital city" , "Exotic capital" .)

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

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