Reveal what a sunbathing nudist might do? (3,4)

I believe the answer is:

lay bare

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

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

I can't explain the remainder of the clue.

(Other definitions for lay bare that I've seen before include "Show clearly, disclose" , "Expose" .)

I've seen this clue in The 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.