Allow to enter (3,2)

I think it could be either:

Which length description are you looking for?:

3,2

let in

'allow to enter' is the definition.
(I've seen this before)

This is the entire clue.

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

I've seen this clue in The Washington Post, the Newsday and 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.