Expert regularly unveils something hard to get one’s teeth into (8)

I believe the answer is:

cracknel

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

'something hard to get one's teeth into' is the definition.
I can't judge whether this definition defines the answer.

'expert regularly unveils' is the wordplay.
'expert' becomes 'crack' (as in 'a crack team').
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'unveils' are 'nel'.
'crack'+'nel'='CRACKNEL'

Can you help me to learn more?

(Another definition for cracknel that I've seen is " sweet".)

I've seen this clue in The Times.

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.