Frank —, US musician and composer who co-wrote and co-directed 1971 film fantasy 200 Motels (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
zappa
(Other definitions for zappa that I've seen before include "Frank --, US guitarist and composer" , "Frank ---, US rock composer" , "Frank --, US musician" , "Mothers of Invention leader" , "Inventive musician" .)