Ingredient in an old-fashioned
I believe the answer is:
rye
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ingredient in an old-fashioned</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 rye that I've seen before include "place in East Sussex" , "Hardy cereal crop" , "old port" , "Drink" , "New York bread" .)