So, no revealer today. Is it a Monday themeless, after the themed Saturday? Well, let's see... there's a lot of "B" answers - BLUNDERBUSS (Muzzle-loading firearm), STUMBLEBUM (28D: Second-rate prizefighter), BUMBLEBEES (11D: Big pollinators)... is that what it is? B-related answers? But let's see... there's that MYBAD (37A: "Oops!") in the center. Aha! It's a KLUTZ (49D: One who might cry "Oops!")-progression! Very nice. If only Mr. Johnson had been able to work in Chevy Chase somehow...
The fill is very clean, too, I think. I enjoyed ALTA (17A: Baja's opposite) and BEAMS (44A: Smiles proudly), and APLOMB (48A: Self-confidence) is a nice word. And I suppose I have heard once (or more) that AKRON is the 48A: All-American Soap Box Derby city, but I did not remember it.
A very nice Monday.