I am ‘Sir' with opera in production (10)

I believe the answer is:

impresario

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'i am sir with opera in production' is the definition.
I can't tell whether this defines the answer.

'i am sir with opera in production' is the wordplay.
'i am' becomes 'I'm' (contraction).
'with' says to put letters next to each other.
'in production' indicates an anagram (I've seen this in other clues).
'sir' put after 'opera' is 'operasir'.
'operasir' anagrammed gives 'presario'.
'im'+'presario'='IMPRESARIO'

Can you help me to learn more?

(Other definitions for impresario that I've seen before include "Entertainer" , "Organiser of musical events etc" , "Showman" , "Promoter of public entertainments" , "Arranger of concerts, etc" .)

I've seen this clue in The Independent.

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