A county sorted out (6)
I believe the answer is:
'a county' is the definition.
(I've seen this before)
'sorted out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'sorted' anagrammed gives 'DORSET'.
(Other definitions for dorset that I've seen before include "English county -- sorted (anag)" , "County adjoining 1" , "South-west area" , "Strode (anag.)" , "Coastal county of southern England" .)