Midterm or quiz (4)
I believe the answer is:
test
This clue is a double definition.
'midterm' is the first definition.
(I've seen this in another clue)
'quiz' is the second definition.
(I know that quiz can be written as test)
(Other definitions for test that I've seen before include "Ward off" , "Sample" , "tax" , "criterion" , "Trial; Hampshire river" .)