Lead-in to -logue

The answer to the crossword question “Lead-in to -logue is IDEO” is “IDEO“, which is a combining form that means “idea” or “thought.” It is commonly used to create words that describe a specialized area of study, such as “ideology” (the study of ideas) or “ideologue” (a person who strongly supports a particular set of ideas). In the context of the crossword puzzle, the clue is asking for a word that starts with “IDEO” and ends with “-logue“, indicating that the answer is likely a word related to the study or discussion of ideas.