The term 'blew the whistle' is an idiom that means to reveal information about a wrongdoing or illegal activity. The crossword solutions for this term are 'SANG' (4 letters), 'TOOTED' (6 letters), and 'TATTLED' (7 letters). All three words can be used to describe the act of revealing information, with 'SANG' implying a loud and proud announcement, 'TOOTED' suggesting a short and sharp sound, and 'TATTLED' implying a gossipy whisper.