A feeling of calm arising from featured material, intended to be played aloud (11)

I believe the answer is:

contentment

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'a feeling' is the definition.
(contentment is a kind of feeling)

I don't understand the rest of the clue.

(Other definitions for contentment that I've seen before include "pleasure" , "peace of mind" , "Satisfied state" , "Comfort" , "Satisfaction" .)

I've seen this clue in The Irish Times.

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