LASE is the solution to the crossword clue for the term 'Whack a Mole'. Whack a Mole is a popular arcade game in which players use a mallet to hit plastic moles that pop up from holes in a board. The goal of the game is to hit as many moles as possible before they disappear back into their holes. The term 'LASE' is an acronym for 'Light Activated Sensor Electronics', which is the technology used in the game to detect when a mole has been hit.