Last minute adjustment avoiding dreadful test for ex-students (6)
I believe the answer is:
alumni
'ex-students' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for alumni that I've seen before include "Graduates of an institution" , "Past pupils or graduates" , "Past pupils, former students" , "Put too much strain on, as Revenue Commissioners do" , "Past pupils of the old school" .)