Online image (6)
I believe the answer is:
avatar
'online image' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for avatar that I've seen before include "Manifestation of a deity (Hinduism)" , "Archetype" , "Divine manifestation" , "Personification of an idea - 2009 James Cameron film" , "Online image" .)