Mammal that chews the cud (8)
I believe the answer is:
ruminant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mammal that chews the cud</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 ruminant that I've seen before include "Cud-chewing animal" , "contemplative" , "Mammal that chews the cud" , "Animal that chews the cud" , "Beast that chews the cud" .)