Cherry-pick (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cherry-pick</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cull that I've seen before include "Selectively slaughter" , "Choose; thin out" , "Select and kill to reduce numbers" , "Exercise to reduce numbers" , "Select to kill to lower numbers" .)