Fastens, binds (4)
I believe the answer is:
ties
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fastens</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(tying is a kind of fastening)</span><br/ ><br/ >'<span class="explanation-format__original">binds</span>' is the second definition.<br/ ><span class="explanation-format__explanation">('tie' can be a synonym of 'bind')</span><br/ ><br/ ></span>
(Other definitions for ties that I've seen before include "Fastens with a knot" , "Attaches, knots" , "Binds with male neckwear" , "Connects" , "Items of neckwear" .)