Bible book in which Gabriel featured prominently (7)

I believe the answer is:

genesis

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'bible book' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

(Other definitions for genesis that I've seen before include "Old Testament Book 1" , "First book of the Bible" , "name of group" , "Band; book" , "Beginning the holy book" .)

I've seen this clue in The Independent.

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