Joan “Tiger” Morse (1932-1972) was a New York fashion designer. Part of the Warhol crowd and the subject of a Warhol film in 1967. She died from a drug overdose in 1972.
She is credited as "Fashion advisor" on We're Only In It For The Money.
The costumes came from fashion designer Tiger Morse whose Kaleidoscope boutique was the hippest in town. - Frank Zappa: A Biography Barry Miles (Atlantic Books 2014)