Crossword Genius

Variable resistance (8)

Ross

I believe the answer is:

rheostat

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">variable resistance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for rheostat that I've seen before include "Variable resistance" , "showing some resistance" , "Electrical device" , "Resistor for regulating current" , "Means of controlling resistance" .)

I've seen this clue in The Times.
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