Name top city in Western Asia (5)

I believe the answer is:

dubai

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

'city in western asia' is the definition.
'dubai' can be an answer for 'city' (I've seen this before). I'm not sure about the 'in western asia' bit.

'name top' is the wordplay.
'name' becomes 'dub' (**).
'top' becomes 'ai' (I've seen this in other clues).
'dub'+'ai'='DUBAI'

Can you help me to learn more?

(Other definitions for dubai that I've seen before include "Persian Gulf emirate" , "sheikdom?" , "Arab city" , "Middle Eastern destination" , "capital and port" .)

I've seen this clue in The Telegraph.

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