Copy a restaurateur originally introducing a pasta sauce (9)

I believe the answer is:

carbonara

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'pasta sauce' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'copy a restaurateur originally introducing a' is the wordplay.
'copy' becomes 'carbon' (carbon is a kind of copy**).
'originally' indicates taking the first letters.
'introducing' means one lot of letters go next to another.
The first letter of 'restaurateur' is 'r'.
'carbon'+'a'+'r'+'a'='CARBONARA'

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(Another definition for carbonara that I've seen is " Type of pasta sauce".)

I've seen this clue in The Times.

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