Mythical figure who drowned in the Aegean during an attempt to escape a labyrinthine prison on Crete (6)
I believe the answer is:
icarus
(Other definitions for icarus that I've seen before include "he drowned" , "Ancient Greek who flew so high his wings melted" , "Legendary character" , "Ill-fated flyer of myth" , "Mythical flier who went too near the sun" .)