Irregular, abnormal (9)
I believe the answer is:
anomalous
I believe this is a double definition.
'irregular' is the first definition.
(I've seen this before)
'abnormal' is the second definition.
(similar in meaning)
(Other definitions for anomalous that I've seen before include "Inconsistent - out of place" , "Abnormal, irregular" , "Deviating from normal" , "Aberrant" , "Inconsistent, deviating from the norm" .)