Shoe spike
I believe the answer is:
cleat
'shoe spike' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cleat that I've seen before include "Strip used to strengthen a surface to which it is attached" , "One to fasten rope to" , "Projection for a rope on board" , "Projection to tie a rope around" , "Device on which to secure a rope" .)