Interesting Tuesday theme of DOUBLEUP (60A: Share a single bed … or a hidden feature of 17-, 23-, 36-, and 50-Across), with the letters "UP" appearing twice in each theme answer. Not bad. I've never heard of CHUPACHUPS (50A: Confectionery brand with a logo designed by Salvador Dalí), but the clue validates it.
Nice to see LOUISCK (55A: Stand-up comedian with multiple Emmys) in there. I wonder if this is his first time in a puzzle? AFTERDARK (8D: Under the cloak of night) and LOVECHILD (33A: 1968 #1 hit for Diana Ross & the Supremes) are pretty nice long downs. SPLOSH (45D: Quiet sound of water on the side of a pail, say) is a bit much. ALLCAPS (18D: WHAT THIS IS IN) and PLATEAU (24D: Stop getting any higher), though, are both great.
Overall, this has lots of interesting (MAITAI (57A: Drink that gets its name from the Tahitian word for "good")) and uncommon (TRITON (19A: Moon of Neptune)) fill, which is always welcome, and it played a little harder for me than Tuesdays sometimes do. I give it an enthusiastic "thumbs up!"