Something to crack is a phrase that can refer to a variety of different things. The crossword solutions for this phrase are SMILE (5 letters), CODE (4 letters), NUTSHELL (8 letters), and SECRETCODE (10 letters). A SMILE is a facial expression that can be used to convey happiness, amusement, or other positive emotions. A CODE is a system of symbols, letters, or words used to represent a message, such as a secret CODE. A NUTSHELL is a phrase used to describe something that is concise and easy to understand. Finally, a secret CODE is a CODE that is kept hidden from others and is used to protect sensitive information.