Gather it's what people may go to church for (5)

I believe the answer is:

amass

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'gather' is the definition.
(amass can mean to collect or gather)

I can't explain the rest of the clue.

(Other definitions for amass that I've seen before include "store" , "Collect or gather" , "Accumulate, heap up" , "Put together" , "run up?" .)

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

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