Departure from what is normal or expected (10)
I believe the answer is:
aberration
(Other definitions for aberration that I've seen before include "Unwelcome deviation from normal" , "Mental lapse" , "mistake" , "irregularity" , "Straying" .)
I believe the answer is:
aberration
(Other definitions for aberration that I've seen before include "Unwelcome deviation from normal" , "Mental lapse" , "mistake" , "irregularity" , "Straying" .)