PET SHOP BUY is a job description for someone who purchases items for a pet shop. The three crossword solutions for this job are LEASH (5 letters), GUPPY (5 letters) and CAGE (4 letters). LEASH is a type of strap or rope used to restrain or control an animal, usually a dog. GUPPY is a type of small freshwater fish that is popular in aquariums. CAGE is an enclosure used to contain animals, such as birds or rodents.