1) Common nag 2) Farm horse 3) Name for a farm horse 4) Old work horse 5) Quiet mare 6) Quiet, plodding horse 7) Stereotypical farm horse 8) Stereotypical horse 9) Workhorse Found on https://www.crosswordclues.com/clue/dobbin
a horse, esp. a quiet, plodding horse for farm work or family use. · a drinking vessel of the 18th century holding a gill. Found on https://www.infoplease.com/dictionary/dobbin