Some realising we ruined African city (5)

I believe the answer is:

gweru

I'm a little stuck... Click here to teach me more about this clue!

'african city' is the definition.
I know nothing about this answer so I can't tell whether this works.

'some realising we ruined' is the wordplay.
'GWERU' is hidden in amongst the letters.
But, I am uncertain how this is indicated.

Can you help me to learn more?

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app