Greedy king of myth (5)
I believe the answer is:
midas
'greedy king of myth' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for midas that I've seen before include "His touch made gold" , "I'm sad (anag) -- king of Phrygia" , "Everything he touched turned to gold" , "Legendary king whose touch turned things to gold" , "my gift turned out a curse" .)