Restraining strap (4)
I believe the answer is:
rein
(Other definitions for rein that I've seen before include "Harness item" , "Restraining lead" , "Check; control" , "Strap to control horse" , "Director's power" .)
I believe the answer is:
rein
(Other definitions for rein that I've seen before include "Harness item" , "Restraining lead" , "Check; control" , "Strap to control horse" , "Director's power" .)