The bulletin's incomplete, you'll admit (3,2)

I believe the answer is:

let in

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

'admit' is the definition.
(synonyms)

'the bulletin's incomplete you'll' is the wordplay.
'LET IN' is hidden in amongst the letters.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for let in that I've seen before include "Allow to enter" , "Grant entry" , "Admit" , "swindle . . ." , "Allowed to enter" .)

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.