Rhyme or reason

If you're considering a recurring verse, please refrain.

Welcome back to Pocket Squares! Hope this puzzle finds you tan but not too sunburnt. 

I've had a fun and itinerant postgrad summer (say hi if you see me at Lollapuzzoola!). This blog is going to be a little quieter now that I'm not on the hook for a newspaper contribution every week or so, although that does accentuate the "without prior notice" tagline.

Does anyone have any poetry recommendations? Trying to enter my season of mists and mellow fruitfulness over here.

Some link recs below the puzzle, as usual. Have fun!

Linkin' Park: 

• 1-across: Well, obviously
• 2-across: I'm generally opposed to the destruction of an entire train, but if you're gonna do it...
• 21-across: Say what you will about Barbie, but that movie had a soundtrack.
• 1-down: Please take a second to check out some beautiful maps.
• 21-down: What even...
• 44-down: Obligatory Know Your Meme