Reanimated corpse (6)
I believe the answer is:
zombie
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reanimated corpse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for zombie that I've seen before include "Lethargic person" , "Dead body brought back to life" , "Animated corpse" , "Corpse revived by witchcraft in W Indies" , "Undead monster" .)