Beer ingredient (4)
I believe the answer is:
hops
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">beer ingredient</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 hops that I've seen before include "Dances -- beer ingredient" , "Skips" , "what could make you bitter" , "Shop around for beer material" , "Leaps on one leg" .)