Russian wolfhound shucked barley (4)

I believe the answer is:

orzo

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'barley' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Another definition for orzo that I've seen is " Pasta".)

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

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