Loop-hole (6)
I believe the answer is:
eyelet
I believe this is a double definition.
'loop' is the first definition.
(I know that loop can be written as eyelet)
'hole' is the second definition.
(hole for putting a shoelace through)
(Other definitions for eyelet that I've seen before include "One caught by hook" , "Hole in shoe through which lace passes" , "Small ring, for shoelace perhaps" , "Metal ring reinforcing a small round hole in fabric" , "Small opening in needle for thread" .)