Pleas become void (5)

I believe the answer is:

lapse

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

'become void' is the definition.
(I've seen this in another clue)

'pleas' is the wordplay.
'pleas' anagrams to 'LAPSE'.
Though, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for lapse that I've seen before include "Inadvertent error" , "Sepal (anag)" , "Retrogress" , "Slight error as caused by inattention" , "Momentary mistake" .)

I've seen this clue in The Irish Independent.

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.