Injure badly by beating (4)
I believe the answer is:
maul
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">injure badly by beating</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 maul that I've seen before include "Wound by scratching and tearing - rugby move" , "Treat roughly; heavy hammer" , "Handle roughly, batter" , "Pummel" , "Loose 10 (in rugby)" .)