The coming of the Christian faith (6)

I believe the answer is:

advent

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'the coming' is the definition.
(advent is the arrival or coming of something)

I can't explain the remainder of the clue.

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(Other definitions for advent that I've seen before include "Coming - occasion in Church calendar" , "Pre-Christmas season for Christians" , "Time approaching Christmas" , "It's a-coming in December!" , "when the Church year begins" .)

I've seen this clue in The Globe and Mail.

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