Fighting extremists emerging from factions (6)

I believe the answer is:

action

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'fighting extremists' is the definition.
'action' can be an answer for 'fighting' (as in military action). I'm unsure of the 'extremists' bit.

'from factions' is the wordplay.
'from' says the answer is hidden in the clue.
'ACTION' can be found hidden inside 'factions'.

'emerging' acts as a link.

Can you help me to learn more?

(Other definitions for action that I've seen before include "Battle or lawsuit, maybe" , "Operation - lawsuit" , "Lawsuit; armed conflict" , "exploit" , "Order to start shooting" .)

I've seen this clue in The Guardian.

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