Timeless, archetypal (7)
I believe the answer is:
classic
I believe this is a double definition.
'timeless' is the first definition.
(thesaurus)
'archetypal' is the second definition.
(thesaurus)
(Other definitions for classic that I've seen before include "Accepted as excellent" , "Model" , "Time-honoured" , "Artistic work of lasting excellence" , "big race" .)