escape clause (also get-out clause)

part of a contract that releases a person, etc from obligations under certain conditions （契约的）例外条款.

erratum, erroneous, erroneously, error, ersatz, erudite, eruditely, erudition, erupt, eruption, Erving Goffman, erysipelas, ESA, escalate, escalation, escalator, escalope, Escalopia, escapade, escape, escape velocity, escape-hatch, escapee, escapement, escapism, escapist, escapologist, escapology, escarole, escarpment, eschatology, eschew, escort, escritoire, escutcheon, Eskimo, ESL, ESN, esophagus, esoteric,