As always, YMMV with walmart, but since they tend to have the same lines on clearance in every store (albeit at different prices) I figure we can post what we found so others can use the info in their hunting.
At one WM near me (Manassas Mall, VA) the only thing on clearance was some older lego Heroica stuff (a $30 set for $16.50) and the tiny friends pool set (reg $6, clearance for $4).
At another store (Chantilly, VA) they had all their Lego in the regular aisle, unmarked. Dino was 50% off (I got 2 Triceratops for $25 each, and one of the $30 raptor set for $15). I also found Creator Seaside house for $35 (about 30% off). They also had one of the $25 battle droid set from last year for $12.50, but I passed (and a kid grabbed it just after me). And the $30 recycle truck was $15.
So there you go. Feel free to post what you guys find, it looks like Dino should be clearanced everywhere, and maybe some of last years SW sets. Remember to scan everything, and look in Toys and their clearance aisles.
We are such stuff as manure is made of, so let's drink up and forget it... -Eugiene O'Neill