Impact if coal gets abandoned is already decided (4,8)

I believe the answer is:

fait accompli

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'abandoned is already decided' is the definition.
I can't tell whether this defines the answer.

'impact if coal' is the wordplay.
'impact if coal' can be anagrammed to 'FAIT ACCOMPLI'.
However, I'm not clear how this is indicated.

'gets' is the link.

Can you help me to learn more?

(Other definitions for fait accompli that I've seen before include "Irreversible action" , "Something done and unalterable" , "Already done, unalterable" , "Something already decided" , "Something irreversibly decided" .)

I've seen this clue in The Irish Times.

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