Crossword Genius

Criticises Scottish reformer audibly (6)

Ross

I believe the answer is:

knocks

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

'criticises' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for knocks that I've seen before include "Raps; criticises" , "Bangs on door" , "Strikes with a sharp blow or finds fault with" , "Hits" , "criticisms" .)

I've seen this clue in The Guardian.
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.