The term 'set off, as an alarm' can be solved by two crossword solutions: 'tripped' (7 letters) and 'TRIP' (4 letters). Tripped is an action verb that means to stumble or cause to stumble, while TRIP is a noun that refers to a journey or a misstep. In this context, the phrase 'set off, as an alarm' can be interpreted as activating an alarm system, either through stumbling or tripping over something, or by pressing a button or switch.