Final answer:
A defeasance clause in a deed of trust requires the trustee to execute a deed of reconveyance, which transfers the title back to the borrower, signaling that the debt has been paid in full.
Step-by-step explanation:
A defeasance clause in a deed of trust is a provision that outlines the responsibilities of a trustee to clear the title to the property in favor of the borrower once the debt is paid off. The specified action required by a defeasance clause is typically that the trustee must execute a deed of reconveyance. This is a conveyancing document that transfers the title of the property back to the borrower from the trustee, effectively releasing any lien that the lender held on it.