Miss street in Irish county (6)
I believe the answer is:
galway
'irish county' is the definition.
(county of Ireland)
'miss street' is the wordplay.
'miss' becomes 'gal' (synonyms).
'street' becomes 'way' (I've seen this before).
'gal'+'way'='GALWAY'
'in' is the link.
(Other definitions for galway that I've seen before include "W. Irish town, county, bay" , "part of Ireland" , "flautist" , "Western City of the Tribes" , "Connacht city" .)