Order parts for old wind instrument (4)

I believe the answer is:

oboe

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'wind instrument' is the definition.
(oboe is a kind of wind instrument)

I don't understand the rest of the clue.

(Other definitions for oboe that I've seen before include "Slender double-reed instrument" , "Orchestral piece" , "Instrument used in 1d" , "Double-reed woodwind" , "blow it!" .)

I've seen this clue in The Independent and The Sun.

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