Harness part (4)
(Other definitions for yoke that I've seen before include "Wooden crosspiece or burdensome restraint" , "It joins two working animals together" , "couple" , "Burdensome restraint or oppression" , "wooden frame" .)
'harness part' is the definition.
('rein' is part of 'harness')
This is all the clue.
(Other definitions for rein that I've seen before include "Strap to control horse" , "Part of a horses's harness" , "A means of control" , "kidney?" , "Leather used for control in horse-riding" .)
'harness part' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hame that I've seen before include "part of horse's collar" , "Bar" , "Highland residence?" .)