Extended feature of "Hey Jude" and "Layla" (4)

I believe the answer is:

coda

(Other definitions for coda that I've seen before include "finale in Beethoven?" , "End piece written for a piece of music" , "Closing section of a musical composition" , "Final part of mus. structure" , "Conclusion of work" .)

I've seen this clue in The New York Times.

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