One who flew too close to the sun (6)
I believe the answer is:
icarus
'one who flew too close to the sun' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for icarus that I've seen before include "High-flyer in Greek mythology" , "made a dangerous flight" , "Excessively high flier" , "Ancient Greek who flew too close to the sun" , "Daedalus's son" .)