Food for cooking dinner gets prepared after one (11)

I believe the answer is:

ingredients

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'food for cooking' is the definition.
I can't judge whether this defines the answer.

'dinner gets prepared after one' is the wordplay.
'prepared' indicates an anagram.
'after' means one lot of letters go next to another.
'one' becomes 'i' (Roman numeral).
'dinner'+'gets'='dinnergets'
'dinnergets' is an anagram of 'ngredients'.
'ngredients' after 'i' is 'INGREDIENTS'.

Can you help me to learn more?

(Another definition for ingredients that I've seen is " Components".)

I've seen this clue in The Telegraph.

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