"What to do to a deal or an envelope" NYT crossword answer is:
SEAL (4 letters length)The answer for "What to do to a deal or an envelope" crossword clue is listed above to help you solve the puzzle you are currently working on.
The answer to the crossword clue NYT (October 2 2023) is "SEAL". To seal a deal or an envelope, you need to use an adhesive, such as glue or wax, to close it. This will ensure that the contents of the envelope or deal remain secure and private. Additionally, sealing a deal or envelope can also be a symbolic gesture, as it signifies the agreement between two parties.