Today’s Newsday Saturday Stumper, by Matthew Sewell, is a tough one, half-hour territory for me. My spirit sagged at 1-A, five letters, “Norwegian flatbread.” (NJAAN?!) I found a better start at 14-A, five letters, “Ladderback chair elements.” 18-A, nine letters, “India, essentially” helped a lot, as did 39-A, eleven letters, “Overlong addresses.” That last answer is one of several unusual longish ones in this puzzle.
Some other clue-and-answer pairs of note:
3-D, nine letters, “Guitar-and-castanets performances.” It took me a long time to see that the answer was not another nine-letter word.
15-A, five letters, “Part of a Moscow mule, perhaps.” And with a complicated history. No thanks.
21-D, eight letters, "What some game app developers work with." Not every pun deserves respect.
23-A, thirteen letters, “Xenomorph.” You see what I mean about unusual longish answers?
25-D, eight letters, “Insects that coevolved with tropical trees.” Also unusual medium-length answers.
27-D, four letters, “The Bard's ‘being next to Devil,’ per Coleridge.” Misparsing the clue makes the easy answer much more difficulty to see.
30-D, nine letters, “Mustard or cocoa.” Someone understands me.
37-D, eight letters, “The ’40s Motorette, e.g.” What?
My favorite in this puzzle: 29-A, eleven letters, “It may not be all that it’s cracked up to be.”
No spoilers; the answers are in the comments.