Stop extremists' ceremony in the spirit of folklore (6)

I believe the answer is:

sprite

I'm a little stuck... Click here to teach me more about this clue!

'spirit of folklore' is the definition.
'sprite' can be an answer for 'spirit' (thesaurus). I am not sure about the 'of folklore' bit.

'stop extremists' ceremony' is the wordplay.
'extremists'' suggests removing the centre (I've seen 'extremists' mean this).
'ceremony' becomes 'rite' (rite is a kind of ceremony).
'stop' with its centre taken out is 'sp'.
'sp'+'rite'='SPRITE'

'in the' acts as a link.

Can you help me to learn more?

(Other definitions for sprite that I've seen before include "water pixie" , "Brownie" , "Pet, sir, could be a goblin" , "Naiad" , "Puck, say" .)

I've seen this clue in the Sydney Morning Herald.

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