The term GRIMM BEGINNING is a reference to the Brothers Grimm, two German authors who wrote and collected folk tales in the early 19th century. The crossword solutions for this term are ONCE (4 letters) and ONCEUPONATIME (13 letters). ONCE is an adverb that means 'one time' or 'at one time, ' while ONCEUPONATIME is a phrase that is often used to introduce a fairy tale. Together, these two solutions represent the Brothers Grimm's work in collecting and writing folk tales.