Displays locks in the East End? (4)

I believe the answer is:

airs

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

'displays' is the definition.
(air can mean to show or display)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for airs that I've seen before include "Tunes and posturings" , "songs" , "Attitudes or tunes" , "Melodies or artificial manners" , "Strain's" .)

I've seen this clue in The Telegraph.

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.