Positive pole (5)
I believe the answer is:
anode
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">positive pole</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 anode that I've seen before include "Electrical terminal" , "that comes out of a cell?" , "Positive electrode" , "Electrical pole" , "A cell terminal" .)