The crossword solution for the term 'Think Tank Nugget' is 'IDEA'. An IDEA is a thought or suggestion as to a possible course of action. It is often used in the context of creative problem solving and can be used to generate new solutions to existing problems. Think tanks are organizations that specialize in research and analysis of public policy issues, and a nugget is a small, valuable piece of information. Therefore, the term 'Think Tank Nugget' refers to a valuable IDEA or suggestion that has been generated by a think tank.