The term 'Good Going!' can be expressed in four different ways using crossword solutions. The first solution is 'YEAH' which is a slang term used to express agreement or approval. The second solution is 'NICE' which is an adjective used to describe something that is pleasant or attractive. The third solution is 'Attaboy' which is an informal expression of encouragement or praise. The fourth solution is 'Niceone' which is another informal expression of approval or congratulations. All of these solutions are ways to express the sentiment of 'Good Going!'