Crossword Genius

Begin to be jumpy (5)

Ross

I believe the answer is:

start

I'm a little stuck... Click here to teach me more about this clue!

'begin' is the definition.
('start' can be a synonym of 'begin')

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for start that I've seen before include "Set in motion" , "Take the first step" , "Jump suddenly" , "Onset" , "Commencement" .)

I've seen this clue in the Evening Standard.
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.