A Labor nut squandered capital (4,5)

I believe the answer is:

ulan bator

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'capital' is the definition.
(Ulan Bator is an example)

'a labor nut squandered' is the wordplay.
'a labor nut' can be anagrammed to 'ULAN BATOR'.
However, I am not clear how the anagram is indicated.

Can you help me to learn more?

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

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

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