If unread (anag) — it's related to Sigmund! (8)
I believe the answer is:
freudian
(Other definitions for freudian that I've seen before include "Error revealing an unconscious thought" , "This slip seems to reveal unconscious feelings" , "Like subconscious slip" , "To do with psychiatrist Sigmund - maybe a slip" , "Relating to a particular psychoanalyst" .)