Eureka! Cause is a phrase that is used to express the feeling of joy and excitement when one has a sudden realization or insight. It is derived from the Greek phrase 'heurēka, ' which translates to 'I have found it!' The crossword solutions for this term are 'SOLUTION' (8 letters) and 'IDEA' (4 letters). SOLUTION is a term used to describe a means of solving a problem, while IDEA is a term used to describe a thought or concept. Together, these two words can be used to describe the feeling of joy and excitement when one has a sudden realization or insight.