Cartilage in meat (7)
I believe the answer is:
gristle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cartilage in meat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gristle that I've seen before include "Tough flexible tissue" , "Stir leg to get tough tissue in meat" , "It's hard to eat" , "Cartilage in meat" , "Sinew" .)