Such courage is never put out (5)

I believe the answer is:

nerve

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'such courage' is the definition.
'nerve' can be an answer for 'courage' (nerve is a kind of courage). I am not certain of the 'such' bit.

'never put out' is the wordplay.
'put out' indicates an anagram.
'never' is an anagram of 'NERVE'.

'is' is the link.

Can you help me to learn more?

(Other definitions for nerve that I've seen before include "Cheek; self-possession" , "Impulse transmitter - bottle" , "Temerity" , "Fibre that carries instructions to the brain" , "Grit" .)

I've seen this clue in The Globe and Mail.

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