Mixed conclusions from data depress kind editor (8)
I believe the answer is:
assorted
'mixed' is the definition.
(I know that mixed can be written as assorted)
'conclusions from data depress kind editor' is the wordplay.
'conclusions from' says to take the final letters (the letters which conclude the words).
'kind' becomes 'sort' (synonyms).
'editor' becomes 'ed' (abbreviation).
The last letters of 'data depress' are 'as'.
'as'+'sort'+'ed'='ASSORTED'
(Other definitions for assorted that I've seen before include "Miscellaneous, sundry" , "Manifold" , "Of different kinds put together, like sweets" , "Mixed" , "Rod's seat (anag)" .)