Washer programme, with movable energy control (5)

I believe the answer is:

reins

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'control' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

(Other definitions for reins that I've seen before include "Control for horses" , "Checks" , "Means of control for a horse" , "Straps for controlling a horse" , "Bridle straps" .)

I've seen this clue in The Independent.

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