The cat’s pajamas

The crossword question, “The cat’s pajamas is TOPS,” is referring to an idiom used to describe something or someone that is considered outstanding or superior. The phrase is believed to have originated in the 1920s in the U.S. and gained popularity during the era of the flapper culture. To say that something or someone is the cat’s pajamas implies that they are the very best, similar to saying they are “the bee’s knees” or “the cream of the crop“. Therefore, the answer to this crossword question is TOPS, which can be used as a synonym for excellent or superior.