Party run by group in English county (6)
I believe the answer is:
dorset
'english county' is the definition.
(I've seen this before)
'party run by group' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'run' becomes 'r' (cricket abbreviation).
'by' says to put letters next to each other.
'group' becomes 'set' (set is a kind of group**).
'do'+'r'+'set'='DORSET'
'in' is the link.
(Other definitions for dorset that I've seen before include "English county -- sorted (anag)" , "Weymouth's county" , "County adjoining 1" , "Strode (anag.)" , "Sorted out the southern English county" .)