"If ... be the food of love, play on" (Twelfth Night) (5)

I believe the answer is:

music

(Other definitions for music that I've seen before include "Vocal or instrumental sounds" , "'If ... be the food of love, play on'(Twelfth Night)" , "being confined by bars?" , "Art of instrumental performance" , "Shakespeare: 'If . . . . . be the food of love, play on'" .)

I've seen this clue in The Irish Times.

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