Essentially concluded a new depressing experience for man of property (9)
I believe the answer is:
landowner
'man of property' is the definition.
(I've seen this before)
'essentially concluded a new depressing experience for' is the wordplay.
'essentially' indicates the central letters.
'a' becomes 'an'.
'new depressing experience for' becomes 'downer' (I can't explain this - if you can you should believe this answer much more).
The middle letter of 'concluded' is 'l'.
'l'+'an'+'downer'='LANDOWNER'
Can you help me to learn more?
(Other definitions for landowner that I've seen before include "Possessor of real estate" , "Owner of an area" , "Squire, perhaps" , "Laird" , "One may have lots of grass" .)