Cancel yearbook with an article expunged (5)

I believe the answer is:

annul

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

'cancel' is the definition.
(I know that annul is a more specific form of the action cancel)

I cannot understand how the rest of the clue works.

(Other definitions for annul that I've seen before include "Cancel or render void" , "Cancel officially" , "Obligation" , "Quash" , "scratch" .)

I've seen this clue in The Sun.

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.