Hide dough in ear (5)

I believe the answer is:

cache

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'hide' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for cache that I've seen before include "Treasury" , "Hidden store of things" , "Concealed store" , "Collection of hidden things" , "Conceal" .)

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

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