Instrument an artist plays endlessly (5)

I believe the answer is:

sitar

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'instrument' is the definition.
(musical instrument)

I don't understand how the rest of the clue works.

(Other definitions for sitar that I've seen before include "Plucked instrument" , "Indian musical instrument like long-necked lute" , "It takes pluck" , "instrument out east" , "Stringed instrument of the subcontinent" .)

I've seen this clue in The Irish Independent.

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