Constrict, squeeze (7)
I believe the answer is:
tighten
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">constrict</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that constrict is a more specific form of the action the tighten)</span><br/ ><br/ >'<span class="explanation-format__original">squeeze</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(tighten can mean to squeeze or contract)</span><br/ ><br/ ></span>
(Other definitions for tighten that I've seen before include "increase tension" , "Give an extra turn" , "becoming tense" , "Restrict" , "Stiffen" .)