Some studies say I stressed writer (8)
I believe the answer is:
essayist
'writer' is the definition.
(I know that essayist is a type of writer)
'some studies say i stressed' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ESSAYIST' is hidden in the letters of 'studies say i stressed'.
(Other definitions for essayist that I've seen before include "Writer of short compositions" , "Lamb, perhaps" , "Writer of short literary pieces" , "I write" , "kind of writer" .)