This is a common thing that Walmart does. They have "secret" clearance. Some items even being full price in store but scan cheap on their app and they will price match it. More on reddit.com

Worked clearance, NOT hidden clearance, just stuff that fell through the cracks. Most stores are understaffed and sometimes there are huge amounts of price changes More on reddit.com

Check out Brickseek.com that’s what I use. I also follow lots of coupon pages as well as brickseek on Instagram, they post the deals there. Although they vary by store. Most of the time the deals are for items that are close to being discontinued, so most places are already out of the item and only some are lucky to find it at that price. Good luck :) I’ve never been able to personally find the items in my local store because I live in a smaller town, so by the time I get to look, the item has already been sold out at the regular price and it never stays long enough to reach the discontinued price. I feel like bigger cities with more stores have better luck. More on reddit.com

Yeah I don't even look in the clearance section anymore. It's loaded with useless shit and even good stuff is like... Was $25 now $22. That's not clearance that's a sale More on reddit.com