Let It Be So' is a phrase that has been used in many contexts over the years. It is often used as a way to express agreement or acceptance of a situation or decision. The word 'AMEN' is a Hebrew word that means 'so be it' and is used as a response to express agreement or support for something said or done. Therefore, the crossword solution 'Let It Be So' can be interpreted as an expression of agreement or acceptance of a situation or decision.