Stanch, check (4)
I believe the answer is:
stem
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">stanch</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that stanch can be written as stem)</span><br/ ><br/ >'<span class="explanation-format__original">check</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(both can mean to control or stop)</span><br/ ><br/ ></span>
(Other definitions for stem that I've seen before include "Ski turn and plant stalk" , "Thwart; support" , "Stalk - check" , "something growing?" , "Supporting structure" .)