Army without leader entering level ground? It has potential to crack (9)

I believe the answer is:

porcelain

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

'it has potential to crack' is the definition.
(porcelain pottery might crack)

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

Can you help me to learn more?

(Other definitions for porcelain that I've seen before include "fragile goods" , "Crockery" , "Fine earthenware" , "Fine white China" , "Jasper, perhaps" .)

I've seen this clue in The Guardian.

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.