Podcasts are no longer revolutionary. By this point, you’ve either listened to the two seasons of “Serial”—the true-crime sensation that mainstreamed podcasting in 2014—or been told by your cousin, your co-worker or the guy who sells you your morning latte that you absolutely need to. There are podcasts about bad movies, podcasts to help you fall asleep and now even podcasts about podcasts.

For a long time, what was lacking was a truly breakout fashion podcast. Then, in July 2016, came Blamo!, an interview podcast hosted...