Borrowing many ideas, church backing the French reviews dismissing religious instruction (11)

I believe the answer is:

eclecticism

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'borrowing' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

I don't understand the remainder of the clue.

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(Another definition for eclecticism that I've seen is " The taking of ideas from a wide range of sources".)

I've seen this clue in The Times.

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