Cosmetics? Flimsy stuff is vexing (10)

I believe the answer is:

toiletries

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

'cosmetics?' is the definition.
(cosmetics is a kind of toiletries)

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

(Other definitions for toiletries that I've seen before include "Soaps, shampoos, etc" , "soft soap and flannel?" , "which are for use in the bathroom" , "grooming products" .)

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.