Small hole (6)
'small hole' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eyelet that I've seen before include "Small opening in shoe for lace" , "Small hole for lace, etc" , "Family of pheasants" , "Small opening for needle or shoelace" , "hole in shoe leather?" .)
(Other definitions for perforation that I've seen before include "holes?" , "Boring" .)