Essays written in examinations (5)
I believe the answer is:
tests
This clue could be a double definition.
'essays written in' is the first definition.
'tests' can be an answer for 'essays' ('test' can be a synonym of 'essay'). I am not sure about the 'written in' bit.
'examinations' is the second definition.
('test' can be a synonym of 'examination')
Can you help me to learn more?
(Other definitions for tests that I've seen before include "Trials for cricketers" , "Tries out" , "Examinations, trials" , "Major cricket matches" , "Puts to proof at cricket matches" .)