IN' CLARIFY The crossword solution for the term 'become clear, with 'IN'' is 'SINK (4 letters) IN'. This phrase is used to describe a situation IN which something becomes more understandable or easier to comprehend. It is often used when referring to a difficult concept or problem that has been explained IN a way that makes it easier to understand. The word 'SINK' is used to refer to the process of understanding something, and the word 'IN' is used to indicate that the process of understanding is taking place.