Crossword Genius

Hide dough in ear (5)

Ross

I believe the answer is:

cache

I'm a little stuck... Click here to teach me more about this clue!

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

I don't understand the remainder of the clue.

Can you help me to learn more?

(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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