Clip or catch (8)
I believe the answer is:
fastener
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clip</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">catch</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for fastener that I've seen before include "Clip, catch or other means of fixing securely" , "Device for joining things together" , "Device that closes clothes - may be a zip" , "Securing clip" , "Eg, clip or catch" .)