The term 'MIND FLASH' can be broken down into two crossword solutions: IDEA (4 letters) and MIND (4 letters). The term 'IDEA' is defined as a thought or suggestion as to a possible course of action, while the term 'MIND' is defined as the element of a person that enables them to be aware of the world and their experiences, to think, and to feel. Together, the two terms form the phrase 'MIND FLASH, ' which is used to describe a sudden, unexpected burst of creativity or insight.