Avengers #22 1964 Marvel Comics: Jack Kirby and Wally Wood Cover

"The Avengers try to find out who framed them and disband for the time being. The Scarlet Witch briefly considers becoming a lounge singer (!) but instead she, Quicksilver and Hawkeye are enticed to join the circus, which turns out to be the superpowered criminals the "Circus of Crime" (then called the "Masters of Menace)."