Die from dried berry mostly (4)

I believe the answer is:

cube

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

'die' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for cube that I've seen before include "Raise to the third power" , "Six-faced solid" , "Hexahedron with six plane faces" , "Three-dimensional square" , "Product of three equal numbers" .)

I've seen this clue in The Sunday Times and 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.