One half of a matched foot-warming pair that mysteriously goes missing from the laundry just when folding finally begins

Thanksgiving desserts with a crust4 What a dog may offer for a "shake"3 Three, in Roman numerals3 Conclusion3 Take control of the wheel5 Groan's partner4 ___ Law, adage that states "Anything that can go wrong will go wrong" ... and a reason for the situations at 20a, 28a, 37a, 51a, and 34d7 Result when a number is divided by itself3