Not completely wrong eating during last series of exams (6)
I believe the answer is:
finals
'exams' is the definition.
(final is a kind of exam)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for finals that I've seen before include "University exams" , "The last exams" , "Qualifying exams" , "Last exam at university" , "University examinations" .)