Failure of management (9)
I believe the answer is:
oversight
I believe this is a double definition.
'failure' is the first definition.
(oversight is a kind of failure)
'management' is the second definition.
(overseeing something)
'of' acts as a link.
(Other definitions for oversight that I've seen before include "what supervisor has" , "Supervisor's charged with this" , "Failure to notice - blunder" , "Slip-up" , "Neglect" .)