Perhaps ravioli stuffed with spam (oddly) and tomato sauce (7)

I believe the answer is:

passata

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'tomato sauce' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for passata that I've seen before include "Sieved tomato puree" , "Tomato sauce" .)

I've seen this clue in The Independent.

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