The crossword solution for the term 'Well That Ends Well' is 'ALLS'. This is a reference to the play of the same name by William Shakespeare, which was first performed in 1623. The play is a comedy about two sets of lovers who must overcome various obstacles before they can be together. The title is derived from the proverb 'All's well that ends well', which suggests that if something has a good outcome, then it doesn't matter what happened before.