Reduce, restrict (7)
I believe the answer is:
curtail
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">reduce</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that curtail is a more specific form of the action shorten)</span><br/ ><br/ >'<span class="explanation-format__original">restrict</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that restrict can be written as curtail)</span><br/ ><br/ ></span>
(Other definitions for curtail that I've seen before include "Cut short (an activity)" , "'Cut short, restrict (7)'" , "Dock" , "Reduce in length" , "Reduce in extent" .)