Grant permission to is a phrase that is used to indicate that someone has been given the authority to do something. It is often used in legal documents and contracts, as well as in everyday conversations. The three-letter acronym LET is an abbreviation for the phrase 'LET it be, ' which is used to signify agreement or acceptance of a situation. Therefore, when combined, the phrase grant permission to LET can be interpreted as giving someone the authority to accept a situation.