Food for visual and audible indicators of drowning mouse! (6,3,6)

I believe the answer is:

bubble and squeak

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'food' is the definition.
(bubble and squeak is a kind of food)

I cannot understand how the rest of the clue works.

(Other definitions for bubble and squeak that I've seen before include "food" , "course" , "Dish of leftovers" , "breakfast?" .)

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

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