Asian country incomplete? Thailand once unfinished (9)

I believe the answer is:

indonesia

'asian country' is the definition.
(country in Asia)

I cannot understand how the rest of the clue works.

(Other definitions for indonesia that I've seen before include "somewhere in Asia" , "SE Asian country" , "An ionised country of South East Asia" , "Asian republic" , "I said none (anag) - country" .)

I've seen this clue in The Guardian.

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