Cut down (a tree) (4)
I believe the answer is:
fell
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cut down a tree</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 fell that I've seen before include "Cause to tumble down < hill" , "Hew; tumbled" , "avalanche?" , "Lethal" , "Upland tract" .)