oversight (11)
There are a few possibilities for this:
supervision
'oversight' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for error that I've seen before include "Faulty judgement" , "wrong" , "Mistake from terrorist" , "Boob" , "Slip-up" .)
'oversight' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for lapse that I've seen before include "Error cause by weakness or inattention" , "Loss (in concentration, say?)" , "Fall from usual standard" , "Become void, expire" , "Revert (to bad habits, etc)" .)
'oversight' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for supervision that I've seen before include "Control" , "Oversight" , "provided by the boss" .)