The term 'PROFESSIONAL FIXER' can be broken down into two words: 'PROFESSIONAL' and 'FIXER'. The word 'PROFESSIONAL' is defined as someone who is highly skilled in a particular job or activity, while the word 'FIXER' is defined as someone who is able to solve difficult problems. The crossword solution for this term is 'VET', which stands for Veterinarian. A Veterinarian is a PROFESSIONAL who specializes in the diagnosis, treatment, and prevention of diseases and injuries in animals. They are also responsible for providing medical care to animals, including vaccinations, surgery, and other treatments.