Second drink (6)
I believe the answer is:
chaser
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">second drink</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 chaser that I've seen before include "Drink following one of another sort" , "Different kind of drink - horse" , "A drink like beer after whisky" , "Pursuer - of beer after whiskey?" , "Horse; drink following another" .)