Meat sauce (5)
I believe the answer is:
gravy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">meat sauce</span>' is the definition.<br/ ><span class="explanation-format__explanation">(sauce made from meat juices)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gravy that I've seen before include "Kind of train?" , "Meat jus" , "Sauce from meat juice" , "contents of boat or train" , "Meat juices after cooking" .)