Cabling coming out of Buckingham Palace and from old part of Asia (9)

I believe the answer is:

kampuchea

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'part of asia' is the definition.
('Kampuchea' is part of 'asia')

I can't explain the remainder of the clue.

(Other definitions for kampuchea that I've seen before include "Asian nation" , "Local name for Cambodia" , "Former name of Cambodia" .)

I've seen this clue in the Irish Times.

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