Crossword Genius

There's nothing in perplexing secret store (5)

Ross

I believe the answer is:

hoard

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

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

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for hoard that I've seen before include "A lot of people" , "Hard kick" , "Store of money or valuables" , "Hidden stock" , "Store, usually hidden" .)

I've seen this clue in The Irish Independent.
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