Relations going initially to party by road from Kerry (7)
I believe the answer is:
kingdom
'kerry' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?
'relations going initially to party by road' is the wordplay.
'relations' becomes 'kin' (I've seen this before).
'initially' says to take the initial letters.
'to party' becomes 'do' (do is a kind of party).
'by' is a charade indicator (letters next to each other).
'road' becomes 'm'.
The first letter of 'going' is 'g'.
'kin'+'g'+'do'+'m'='KINGDOM'
'from' is the link.
(Other definitions for kingdom that I've seen before include "Regal realm" , "State ruled by monarch" , "Domain of royal ruler" , "Monarchical state" , "What Richard III would have given for a horse" .)