Potion; current (7)
I believe the answer is:
draught
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">potion</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">current</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(a draught is a current of air)</span><br/ ><br/ ></span>
(Other definitions for draught that I've seen before include "Indoor breeze" , "Slug" , "Dose of medicine" , "intake" , "Depth of a ship in the water" .)