A chum returning to one Arabian port (5)

I believe the answer is:

dubai

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'arabian port' is the definition.
'dubai' can be an answer for 'port' (UAE port city). I'm not certain of the 'arabian' bit.

'a chum returning to one' is the wordplay.
'chum' becomes 'bud' (both can mean a friend).
'returning' says the letters should be written in reverse.
'to one' becomes 'i' (Roman numeral).
'a'+'bud'='abud'
'abud' back-to-front is 'duba'.
'duba'+'i'='DUBAI'

Can you help me to learn more?

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

I've seen this clue in The Times.

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