The messenger god — or some other messenger? (6)
I believe the answer is:
hermes
'the messenger god' is the definition.
(Greek messenger god)
'some other messenger?' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'HERMES' can be found hidden inside 'other messenger'.
'or' acts as a link.
(Other definitions for hermes that I've seen before include "Greek messenger god" , "Greek messenger of the gods, like Roman Mercury" , "Greek god of commerce and theft" , "Messenger and herald of the gods" , "Winged messenger" .)