Instrument of torture the Incas never had (5)

I believe the answer is:

wheel

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'instrument of torture' is the definition.
(wheel is a kind of instrument of torture)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for wheel that I've seen before include "A unicycle has one" , "Circular steering device" , "ring" , "Turn in a wide curve" , "Disc on axle for ease of movement" .)

I've seen this clue in The Globe and Mail.

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