Mine, I hope, will never break (5)

I believe the answer is:

nerve

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'mine i hope' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'never break' is the wordplay.
'break' indicates anagramming the letters.
'never' anagrammed gives 'NERVE'.

'will' is the link.

Can you help me to learn more?

(Other definitions for nerve that I've seen before include "Spunk" , "Sauce" , "Strand of body tissue" , "Dangerous type of gas" , "Cheek; self-possession" .)

I've seen this clue in the Evening Standard.

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