The term 'SWEET ENDING' can be broken down into three crossword solutions: OSE (3 letters), NESS (4 letters), and HEART (5 letters). OSE is a suffix that is used to form nouns from verbs, such as in the word 'CLOSURE'. NESS is a suffix that is used to form adjectives from nouns, such as in the word 'HAPPINESS'. HEART is a noun that refers to the organ in the body that pumps blood. All three of these words together create the phrase 'SWEET ENDING', which can refer to a pleasant conclusion to something.