An escape clause, also known as a kickout or knockout clause, is a provision that allows the party to void the contract. For example, the seller may retain the right to look for a more favorable offer, with the original purchaser retaining the right, if challenged, either to firm up the first sales contract (such as by waiving a contingency) or to void the contract. As another example, sellers might insist upon an escape clause in a contract that hinges on the buyers’ selling their home.
You will want to be sure that your agent is familiar with these options and works in you general best interests.