In that case is an expression used to indicate agreement or understanding with a statement or situation. It can be broken down into five crossword solutions: THEN (4 letters), IF (2 letters), ASSAY (4 letters), IFSO (4 letters), and WELLTHEN (8 letters). The first two, THEN and IF, are both conjunctions used to introduce a clause that explains the result of a preceding statement. ASSAY and IFSO are both words that mean 'in that case' or 'IF so'. Finally, WELLTHEN is a combination of the words 'WELL' and 'THEN', which is another way of saying 'in that case'.