Lever altered, adjusted (7)

I believe the answer is:

treadle

'lever' is the definition.
(treadle is a kind of lever)

'altered adjusted' is the wordplay.
'adjusted' indicates anagramming the letters.
'altered' with letters rearranged gives 'TREADLE'.

(Other definitions for treadle that I've seen before include "Pedal operating machine" , "Rocker in a factory" , "Dear, let a foot lever emerge" , "driving mechanism" , "operate a spinning-wheel" .)

I've seen this clue in The Telegraph.

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