The crossword solution for the term SUFFIX WITH EXPERT is 'ISE.' This suffix is commonly used to denote an expert in a particular field. For example, a person who is an expert in the field of psychology may be referred to as a psychologist or a psychotherapist. Similarly, a person who is an expert in the field of engineering may be referred to as an engineer or an engineer-in-training. The suffix 'ise' is also used to denote a profession or a skill, such as a typist or a carpenter.