In strictly mistaken terminology blamed on Leo Fender, a guitar's ____ arm is called a whammy bar (7)

I believe the answer is:

tremolo

(Other definitions for tremolo that I've seen before include "Vibrating musical effect" , "Vibrato effect" , "Violin's rapid repetition of a single note" , "Shaky effect in music" , "Wavering effect in music" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.