Freudian factor (3)
I believe the answer is:
ego
'freudian factor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ego that I've seen before include "Self-esteem, conceit" , "Vowel to disappear, < say another" , "One's self-image" , "Sense of self, conceit" , "Person's sense of self" .)