Destiny's Child or TLC (4)

I believe the answer is:

trio

(Other definitions for trio that I've seen before include "Group of three (musicians)" , "(Composition for) three performers" , "Musical group" , "Ensemble musical piece, eg Beethoven's 'Archduke'" , "Beethoven's 'Archduke', for example" .)

I've seen this clue in the Universal.

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