The term 'Second Opening' can be broken down into two crossword solutions: 'Rerelease' (9 letters) and 'Nano' (4 letters). Rerelease is a verb that means to release something again, usually after it has been modified or updated in some way. Nano is a prefix that means 'very small' and is often used to describe technology that is extremely small in size. Therefore, the term 'Second Opening' could refer to a rerelease of something that is very small in size.