The crossword solution for the term LEAD-IN TO -NOMIC is ERGO, which is a Latin word meaning 'THEREFORE' or 'HENCE'. It is commonly used in philosophical and legal contexts to introduce a logical conclusion. In this context, it is used as a lead-in to the suffix -NOMIC, which is derived from the Greek word 'nomos' meaning 'LAW'. The suffix is used to form words related to laws, regulations, and economic systems.