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