A goddess from another age (4)
I believe the answer is:
hera
'a goddess' is the definition.
(Greek goddess)
'from another age' is the wordplay.
'from' says the answer is hidden in the clue.
'HERA' is hidden within 'another age'.
(Other definitions for hera that I've seen before include "Zeus's wife and sister" , "Sister and wife of 18" , "Greek equivalent of Juno" , "Consort of Zeus" , "Wife of Jupiter" .)