Changes locks (8)

I believe the answer is:

switches

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

This clue might be a double definition.

'changes' is the first definition.
(I know this)

'locks' is the second definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe you can see a link between them that I can't see?

Can you help me to learn more?

(Another definition for switches that I've seen is " changes".)

I've seen this clue in the Sydney Morning Herald, The Guardian and The Telegraph.

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.