Instrument that's used by logger? (8)

I believe the answer is:

recorder

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'instrument' is the definition.
(recorder is a kind of instrument)

I don't understand the remainder of the clue.

(Other definitions for recorder that I've seen before include "Wind instrument - historian, perhaps" , "Fipple-flute" , "Instrument of the flute family" , "Wind instrument much used in schools" , "Judge; woodwind instrument" .)

I've seen this clue in The Telegraph.

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