Smell detected in a city in Italy (5)

I believe the answer is:

aroma

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'smell' is the definition.
(aroma is a kind of smell)

'a city in italy' is the wordplay.
'city in italy' becomes 'roma' (I can't justify this - if you can you should believe this answer much more).
'a'+'roma'='AROMA'

'detected in' is the link.

Can you help me to learn more?

(Other definitions for aroma that I've seen before include "Pervasive atmosphere" , "Redolence" , "Distinctive smell" , "Food fragrance" , "particular charm" .)

I've seen this clue in the Sydney Morning Herald.

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