An ostler is a person who works in a stable, taking care of horses. The term can also refer to someone who works in an inn or tavern, providing services such as carrying luggage and helping guests with their horses. The crossword solutions for the term ostler are GROOM (5 letters) and STABLEMAN (9 letters). A GROOM is someone who takes care of horses, cleaning them, feeding them, and exercising them. A STABLEMAN is someone who works in a stable, taking care of horses and other animals, and performing other duties such as mucking out stalls and repairing equipment.