Greek department saying to cut back on funding (4)

I believe the answer is:

nome

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'greek' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for nome that I've seen is " Government department".)

I've seen this clue in The Times and The Sunday Times.

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