See as self-assertion (3)
I believe the answer is:
eye
This could be a double definition.
'see' is the first definition.
(I've seen this before)
'self-assertion' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'as' is the link.
Can you help me to learn more?
(Other definitions for eye that I've seen before include "Storm-centre" , "Look at with interest" , "Organ of sight" , "One looks" , "central spot" .)