Experience fear or anxiety with loss of male singer (6)

I believe the answer is:

treble

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'singer' is the definition.
(I know that treble is a type of singer)

I don't understand the rest of the clue.

(Other definitions for treble that I've seen before include "High pitched singing voice" , "Multiple score in darts" , "Consisting of three parts; voice" , "Threefold; boy's voice" , "Feat of winning three major trophies" .)

I've seen this clue in the Sydney Morning Herald.

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