Tenochtitlan dweller (5)
I believe the answer is:
aztec
'tenochtitlan dweller' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aztec that I've seen before include "One of Montezuma's people" , "One into human sacrifice" , "Montezuma ruled this empire" , "nickname of US State" , "Early Mexican civilisation" .)