Look to keep very quietly cooking one’s pizza topping (9)

I believe the answer is:

pepperoni

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'pizza topping' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for pepperoni that I've seen before include "Highly-seasoned sausage" , "Spicy Italian sausage" , "Spicy salami" , "Butterfly-attracting shrub" , "Spicy snacks" .)

I've seen this clue in The Times.

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