Thread used by surgeons (8)
I believe the answer is:
ligature
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thread used by surgeons</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ligature that I've seen before include "Something used to tie" , "Tie (to restrict flow of blood)" , "Binding used for strangulation" , "Tie; bandage" , "Bond" .)