The term 'au fait' is a French phrase meaning 'familiar with' or 'up to date'. The crossword solutions for this term are 'WICKED', 'CAPABLE', 'DECOROUS', 'PROPER', 'CONVERSANT', 'INFORMED', 'ABREAST', and 'COMPETENT'. These words all describe someone who is knowledgeable and experienced in a particular field. They suggest that the person is well-versed in the subject matter, has the necessary skills to do the job, and is able to conduct themselves in an appropriate manner. Additionally, they imply that the person is aware of current trends and developments in their field, and is able to keep up with them.