The term 'WHAT I MAY STAND FOR' can be solved by two crossword solutions: ONE (3 letters) and IODINE (6 letters). ONE is an indefinite pronoun used to refer to a single person or thing, while IODINE is a chemical element with the symbol I and atomic number 53. It is a halogen that occurs naturally in the form of iodide salts. Iodine is an essential trace element for humans and animals, and it is used in medicine, photography, and other industrial applications.