Answer: puzzle

AnswerCrossword Clue
PUZZLESomething unexplained
PUZZLERebus, e.g.
PUZZLEFlummox
PUZZLEThis is one
PUZZLEBewilder
PUZZLEYou're doing one
PUZZLEYour current occupation?
puzzleSolve or understand something by thinking hard
puzzleto perplex (to puzzle)
puzzleThink hard about something difficult to understand or explain
puzzleCause (someone) to feel confused because they cannot understand or make sense of something