Hero of the "Argonautica” (5)

I believe the answer is:

jason

(Other definitions for jason that I've seen before include "Greek hero who searched for the Golden Fleece" , "Argonaut leader" , "Leader of the Argonauts who sailed in quest of the Golden Fleece" , "He sailed the Argo to find the Golden Fleece" , "Chief Argonaut" .)

I've seen this clue in The Wall Street Journal.

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