With this gismo lens keeps focused on captured city in Eastern Europe (8)

I believe the answer is:

smolensk

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'with this gismo lens keeps focused on captured city in eastern europe' is the definition.
The definition suggests a singular noun which matches the answer.

'with this gismo lens keeps' is the wordplay.
'with' says the answer is hidden in the clue.
'SMOLENSK' is hidden in the letters of 'this gismo lens keeps'.

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(Another definition for smolensk that I've seen is " Russian city on the Dneiper".)

I've seen this clue in The Irish Times.

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