Foot pedal (7)
I believe the answer is:
treadle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">foot pedal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for treadle that I've seen before include "Foot lever powering machine" , "Machine foot-lever" , "Related (anag.)" , "operate a spinning-wheel" , "Foot-pedal" .)