Not how other people would picture you? (4-8)
I believe the answer is:
self-portrait
'picture you?' is the definition.
'self portrait' can be an answer for 'picture' (I've seen this before). I am not sure about the 'you?' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for self-portrait that I've seen before include "Painting of the artist by the artist" , "Picture of its artist" , "Artist's own picture" .)