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Neurotic dog did this to sheep? (7)

Ross

I believe the answer is:

worried

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'neurotic' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for worried that I've seen before include "Felt or caused to feel anxious or troubled" , "Was unduly anxious" , "far from calm" , "Apprehensive" , "Concerned, anxious, troubled" .)

I've seen this clue in The Sun.
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