I pulled out 1A End of a dorm name, usually: HALL because that was not my dorm in college, so it took me a little longer than it should have. While UCSB had a lot of dorms whose name ended that way, I lived in Manzanita Village. I think it had the number of residents of a normal dorm, but what would have been individual floors of a big building were houses of smaller buildings. Each floor-equivalent was 3-4 stories tall. I lived in Jalama House in a single-occupancy room with an ocean view and soundtrack.
17A “A Fish Called Wanda” co-star [7,9]: KEVINKLINE.
26A A total blast [8,1]: GREATFUN.
40A Purple Heart honoree, maybe [4,0]: WARHERO.
51A Eschew scuba gear, say [3,5]: FREEDIVE.
64A Some poster-making supplies [2,6]: GLUESTICKS.
46D Like 17-, 26-, 40-, 51- and 64-Across, with respect to the numbers in their clues: RHYMING.
Oh, I just got it.
17A SEVEN NINE KEVIN KLINE
26A EIGHT ONE GREAT FUN
40A FOUR ZERO WAR HERO
51A THREE FIVE FREE DIVE
64A TWO SIX GLUE STICKS
Finished this one in 8:13.