Modern paganism opening with incessant charms, canticles, antics (5)

I believe the answer is:

wicca

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'modern paganism' is the definition.
'wicca' can be an answer for 'paganism' (I've seen this before). I'm not sure about the 'modern' bit.

'opening with incessant charms canticles antics' is the wordplay.
'opening' indicates taking the first letters.
The first letters of 'with incessant charms canticles antics' is 'WICCA'.

Can you help me to learn more?

(Other definitions for wicca that I've seen before include "paganism" , "Cult of modern witchcraft" , "Practice of witchcraft" , "Magic" .)

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

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