Old king ring for some fettuccine? (7)

I believe the answer is:

alfredo

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'some fettuccine?' is the definition.
The definition suggests a singular noun which matches the answer.

'old king ring' is the wordplay.
'old king' becomes 'alfred' (Alfred the Great).
'ring' becomes 'o' (letter resembling a ring).
'alfred'+'o'='ALFREDO'

'for' is the link.

Can you help me to learn more?

(Another definition for alfredo that I've seen is " Pasta sauce".)

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

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