Two officers somewhere in Italy (4)

I believe the answer is:

como

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'somewhere in italy' is the definition.
The definition suggests a singular noun which matches the answer.

'two officers' is the wordplay.
'two officers' can mean two replacements for 'officer'.
'officer' becomes 'co' (Commanding Officer abbreviation).
'officer' becomes 'mo' (I can't justify this - if you can you should believe this answer much more).
'co'+'mo'='COMO'

Can you help me to learn more?

(Other definitions for como that I've seen before include "Italian city and lake" , "Town and lake in north Italy" , "lake resort" , "North Italian lake" , "singer" .)

I've seen this clue in the Evening Standard.

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