Answer: clicking

AnswerCrossword Clue
clickingBecome suddenly clear or understandable
clickingMake or cause to make a short, sharp sound
clickingSelect (an item represented on the screen or a particular function) by pressing one of the buttons on the mouse when the cursor is over the appropriate symbol
clickingMove with such a sound
clickingBecome very comfortable with someone at the first meeting
clickingCLICK, to make a short sharp sound
clickingBecome successful or popular
clickingPress (a mouse button)