Restrict or hinder (5)
I believe the answer is:
cramp
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">restrict</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that cramp is a more specific form of the action restrict)</span><br/ ><br/ >'<span class="explanation-format__original">hinder</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for cramp that I've seen before include "Muscular spasm, very painful" , "To restrict; a muscle pain" , "Severe muscular pain" , "hamper" , "Involuntary muscular contraction" .)