Crossword Genius

Give life for one man in Nouvion revolutionary is sheltering (8)

Ross

I believe the answer is:

energise

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'give life' is the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for energise that I've seen before include "Activate" , "Give power to" , "Give active force" , "Motivate" , "To banish inertia" .)

I've seen this clue in The Telegraph.
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