Written works from Midwest states (6)
I believe the answer is:
essays
'written works' is the definition.
(I've seen this before)
'midwest states' is the wordplay.
'midwest' becomes 'es'.
'states' becomes 'says' ('say' can be a synonym of 'state').
'es'+'says'='ESSAYS'
'from' acts as a link.
(Other definitions for essays that I've seen before include "Literary compositions" , "literary work" , "Literary efforts" , "Charles Lamb's particular form of writing" , "Disquisitions" .)