Producer, one working in Paris and Rome (10)
I believe the answer is:
impresario
'producer' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for impresario that I've seen before include "Showman" , "Entertainer" , "Sponsor and manager of public entertainments" , "Producer of performing arts" , "Organiser of musical events etc" .)