Greek goddess of victory (4)
I believe the answer is:
nike
'greek goddess of victory' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for nike that I've seen before include "Goddess of victory - clothing company" , "Victoria" , "bringer of victory" , "Greek winged goddess of victory, and sports goods logo" , "Greek goddess, personification of victory" .)