BURJKHALIFA? (1A: World's tallest building). OK, Mr. Lim, we see how it's going to be...
This one was tough, but I liked it. So many tricky clues. Like 11D: Forward, back or center (ATHLETE) for example... or 36A: Belfast is on its shore (MAINE)! We had a tough time in the NE, but almost everything, once it was gotten, elicited a sigh of understanding rather than a groan. "23A: She's beautiful, per a popular song," for example, (AMERICA), was great. And 12D: Like every Bond film since 1989 (PGTHIRTEEN) had us going down many, many wrong paths.
If it wasn't for our friend Andrew, who knew 7D: "I shall not find myself so ____ die": Antony (APTTO), AND KTOSLIN (5D: Singer of the 1987 #1 country hit "Do Ya"), we might never have finished, because you know we didn't know the name of that building!
This not only seemed especially tricky, it also seemed particularly clean. Sure, the somewhat common TSR (54A: Co. purchased by Wizards of the Coast) was there (but with a clue we'd not seen before), and YAGO (45D: ____ Sant'Gria (wine choice)) was right next to IGOR (46D: Servant in the "Discworld" novels), and we knew neither, but the crosses were gettable, and good, so I don't much mind.
Lastly, Frannie didn't love CRANIA as "43A: Trepanning targets," thinking that trepanning really just went through the crania, and targeted something on the other side, but, well, neither of us are doctors, so perhaps we're missing something. (If only Colum looked at this blog on days other than Sunday...)
Regardless of that detail, I thought this was a good, satisfying solve.