a situation which is difficult to understand because it involves complicated or secret processes and decisions :
There are wheels within wheels in this organization—you never really know what is going on.
a situation which is difficult to understand because it involves complicated or secret processes and decisions :
There are wheels within wheels in this organization—you never really know what is going on.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005