Radio beacon isn't working - it's supposed to save us (15)

I believe the answer is:

decarbonisation

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'supposed to save us' is the definition.
I can't judge whether this defines the answer.

'radio beacon isn't working' is the wordplay.
'working' indicates an anagram.
'radio'+'beacon'+'isnt'='radiobeaconisnt'
'radiobeaconisnt' anagrammed gives 'DECARBONISATION'.

'it's' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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