25A. A snapback is a baseball cap with a flat BRIM. It gets its name from an adjustable strap in the back of the cap that snaps together. Note to those of us who are accustomed to wearing caps with curved brims: Do not try to bend the brim on a snapback. Snapback wearers will make fun of you.
38A. From the Department of Overthinking Things: At first, I thought that the answer to “Duo in an ellipse” might be “ells,” because there are two Ls in the word “ellipse.” The answer is much simpler (I think). There are two FOCI in an ellipse.
49A. This is a compelling new clue for the entry ALA, which is typically clued as “___ mode,” or some such. It is an acronym for the American Library Association, which runs Banned Books Week to draw attention to attempts to challenge freedom of speech.
61A. I had “speeding up” at first for “Going from 99 to 100, say,” which may tell you something about my driving. In this case, however, the clue was about ROUNDING UP.
67A. This one required an online search, even after I had solved it, because my knowledge of the game of pool is limited. POOL SHARKS are “experts in English” because they know how to put sidespin on the balls.
Source : https://www.nytimes.com/2021/11/25/crosswords/daily-puzzle-2021-11-26.html251