The most common and most likely answer to this crossword clue is the 8 letter word LONDONER
I've seen this crossword clue in The Sunday Telegraph
L
O
N
D
O
N
E
R
More clues leading to the result LONDONER
- Academic takes solitary type out to see city dweller
- City gent maybe sustained briefly by kebab
- Capital person finished after working to link both sides
- Academic visiting recluse, a capital person
- Outsider welcomes teacher being in capital
- Recluse must embrace fellow Cockney?
- Capital person academic introduced to unsociable guy
- Solitary type embracing fellow city dweller
- Capital chap, a fellow in solitary?
- Capital fellow, an isolated sort on the outside
Buddy explains!
The straight part
We know that "citizen of ours" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case citizen of ours = londoner.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.