Newspaper opinion piece (4)
(Another definition for oped that I've seen is " article in paper".)
(Other definitions for essay that I've seen before include "Attempt; written piece" , "School compeosition" , "Composition; attempt" , "Short formal piece of writing" , "Short treatise" .)
'newspaper opinion piece' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for editorial that I've seen before include "Chief newspaper article" , "Article that states a newspaper's opinion" , "paper item" , "Newspaper item" , "Statement of a newspaper's opinion" .)