Sniggling Sort is a type of sorting algorithm that uses a combination of insertion and selection sort. It works by first selecting the smallest element in the array and then inserting it into its correct position. This process is repeated until the entire array is sorted. The term 'sniggling' comes from the fact that the algorithm moves elements around in a sniggling fashion. The crossword solution for SNIGGLING SORT is EELER, which is an anagram of the word 'reeler, ' which is another way to describe the sniggling motion of the algorithm.