The term 'TELLS ALL' can be broken down into four crossword solutions: SINGS (5 letters), TATTLES (7 letters), BARES (5 letters), and BLABS (5 letters). SINGS is an action that involves producing musical tones with the voice. TATTLES is an informal term for gossiping or revealing secrets. Bares is to uncover or expose something, while BLABS is to talk too much or reveal information. All of these terms can be used to describe someone who tells all, meaning they are revealing information that should be kept secret.