Weymouth’s county (6)
I believe the answer is:
dorset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">weymouth's county</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dorset that I've seen before include "area of Portland Bill" , "South-west area" , "Sorted out the southern English county" , "Strode (anag.)" , "Weymouth's county" .)