Goddess from a specific point in the past, originally Aztec (6)
I believe the answer is:
athena
'goddess' is the definition.
(I've seen this before)
'a specific point in the past originally aztec' is the wordplay.
'specific point in the past' becomes 'then'.
'originally' says to take the initial letters.
The initial letter of 'aztec' is 'a'.
'a'+'then'+'a'='ATHENA'
'from' is the link.
(Other definitions for athena that I've seen before include "One-time goddess" , "wise but fierce goddess" , "Greek goddess of a capital city" , "Greek goddess of wisdom etc." .)