A beer (5)
I believe the answer is:
lager
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a beer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(type of beer)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lager that I've seen before include "Light-bodied beer" , "Pilsner, for example" , "A regal sort of drink" , "Bottom-fermented beer" , "Local offering" .)