Eyelet (7)
I believe the answer is:
grommet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eyelet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that eyelet can be written as grommet)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for grommet that I've seen before include "Ring of rope or metal" , "Tube in eardrum to drain and ventilate ear" , "Eyelet lining a small hole" , "Metal ring for lining a small hole" , "insulation device" .)