Buttonhole essentially NYT crossword answer is:
SLIT (4 letters length)The answer for Buttonhole essentially crossword clue is listed above to help you solve the puzzle you are currently working on.
A buttonhole is a small slit in a garment, usually in a shirt or jacket, that is used to thread a button through. It is a common feature of formal wear, but can also be found on casual clothing. It is an essential part of the construction of a garment and is often used to create a more tailored look.