Could it be an establishment for treating neurotic patients? (5,6)

I believe the answer is:

nerve centre

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'it be an establishment for treating neurotic patients?' is the definition.
The definition suggests a singular noun which matches the answer.

I don't understand the remainder of the clue.

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(Other definitions for nerve centre that I've seen before include "control of operations" , "heart of operations" , "Place running organisation" , "Operational hub" , "operations are controlled from here" .)

I've seen this clue in The Irish Independent.

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