Supercharger (5)
I believe the answer is:
turbo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">supercharger</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 turbo that I've seen before include "motor" , "source of power" , "Gastropod" , "Type of supercharger using engines exhaust gases" , "found in car" .)