School paper (5)
'school paper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for essay that I've seen before include "Attempt - piece of writing" , "School composition" , "Analytic or interpretive literary composition (5_" , "example of Hazlitt's work" , "Short formal piece of writing" .)
(Other definitions for report that I've seen before include "Journalist's account - explosive noise" , "Short account of the news" , "'Description, account (6)'" , "Explosion" , "Sudden noise (gunfire)" .)