Nahuatl speaker Cate bizarrely keeps zebra (5)

I believe the answer is:

aztec

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'nahuatl speaker' is the definition.
(I've seen this in another clue)

'cate bizarrely keeps zebra' is the wordplay.
'bizarrely' indicates anagramming the letters.
'keeps' is an insertion indicator.
'zebra' becomes 'z' (this could be a standard abbreviation I've not previously seen).
'cate' anagrammed gives 'atec'.
'atec' placed around 'z' is 'AZTEC'.

Can you help me to learn more?

(Other definitions for aztec that I've seen before include "Relating to old civilisation in Mexico" , "Montezuma ruled this empire" , "Early Mex. People" , "Old Mexican Indian" , "Old person" .)

I've seen this clue in The Sun.

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