Neat prose transcribed into another language (9)

I believe the answer is:

esperanto

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'language' is the definition.
(Esperanto is an example)

'neat prose transcribed into another' is the wordplay.
'neat prose' anagrams to 'ESPERANTO'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for esperanto that I've seen before include "Modern language" , "Artificial international language devised in 1887" , "Linguistic invention" , "words, set up artificially?" , "Personate in artificial language" .)

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

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