UCASUCAS /ˈjuːkæs/ noun [uncountable] 
(Universities and Colleges Admissions Service) the official British organization which deals with applications (=official written requests) from students who want to study for a degree at a British university or college → clearing
(Universities and Colleges Admissions Service) the official British organization which deals with applications (=official written requests) from students who want to study for a degree at a British university or college → clearing