1) Brought under control 2) Brought under control, in 3) Checked 4) Checked by a pull 5) Checked by pulling 6) Controlled a horse 7) Controlled with straps 8) Curbed 9) Held in check 10) Held in restraint 11) On a tight leash 12) Pulled up after a canter Found on https://www.crosswordclues.com/clue/reined