Citizen from old city thorn in one’s side it’s assumed (8)
I believe the answer is:
urbanite
'citizen' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'old city thorn in one's side it's assumed' is the wordplay.
'old city' becomes 'ur' (ancient city state).
'thorn in one's side' becomes 'bane' (I've seen this in another clue).
'assumed' means one lot of letters goes inside another.
'bane' placed around 'it' is 'banite'.
'ur'+'banite'='URBANITE'
'from' acts as a link.
Can you help me to learn more?
(Another definition for urbanite that I've seen is " Unbear it for city dweller".)