Crossword Genius

Depletes stock as hunters fail to keep up (4,3)

Ross

I believe the answer is:

runs low

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'depletes' is the definition.
The answer and definition can be both related to consumption as well as being verbs in their -s form.
Perhaps there's a link between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

I've seen this clue in The Independent.
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