Cowboy's cow catcher
I believe the answer is:
lasso
'cowboy's cow catcher' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lasso that I've seen before include "use one for catching cattle" , "Nosed rope" , "Rope with noose for catching animals" , "Cowcatcher" , "snare" .)