The term BE PLAYFUL can be broken down into three crossword solutions: JOKE (4 letters), CAVORT (6 letters), and FRIVOL (6 letters). A JOKE is a humorous statement or story, often with a punchline. Cavorting is to frolic or move around in a lively and playful manner. Frivoling is to behave in a lighthearted and carefree way. Together, these three words suggest that one should be lighthearted and have fun.