Vodka and tomato juice (6,4)
I believe the answer is:
bloody mary
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vodka and tomato juice</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bloody mary that I've seen before include "killing Queen?" , "Tomato juice and vodka" , "it could be an eye-opener" , "something to drink" , "The Red Queen" .)