Freezing; beer (6)
I believe the answer is:
bitter
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">freezing</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">beer</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(bitter is a type of beer)</span><br/ ><br/ ></span>
(Other definitions for bitter that I've seen before include "Intensely cold, beer" , "Acerbic" , "Type of beer" , "Act nervously" , "Sour like some English beer" .)