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Reconstructed Incan material one found in Peru, say (5,8)

Ross

I believe the answer is:

latin american

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'one found in peru say' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'reconstructed incan material' is the wordplay.
'reconstructed' indicates anagramming the letters.
'incan'+'material'='incanmaterial'
'incanmaterial' anagrammed gives 'LATIN-AMERICAN'.

Can you help me to learn more?

(Other definitions for latin american that I've seen before include "possibly from Argentina" , "Mexican, for example" , "Spanish-speaking in the US?" , "like the samba?" , "Coming from south of US" .)

I've seen this clue in The Guardian.
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