Bar mixer
I believe the answer is:
soda
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bar mixer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for soda that I've seen before include "fizz" , "Drink containing carbonated water and sometimes flavouring" , "Variety of pop" , "for use with whisky?" , "Sodium carbonate" .)