Not normal (8)
I believe the answer is:
aberrant
'not normal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aberrant that I've seen before include "Anomalous" , "Departing from accepted standard" , "Irregular" , "Departing from the norm" , "'Deviant, behaviour say (8)'" .)