Messenger of the Greek gods (6)
I believe the answer is:
hermes
'messenger of the greek gods' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hermes that I've seen before include "Messenger and herald of the gods" , "Winged messenger" , "Greek god of commerce and theft" , "Greek messenger of the gods, like Roman Mercury" , "Greek messenger god" .)