What does the cryptic crossword clue "Unconventional Cubist is crackers, maybe (8)" mean?

The wordplay uses an anagram. anagram of CUBIST + IS = BISCUITS The answer is BISCUITS.

Unconventional Cubist is crackers, maybe (8)

Daily Mail Cryptic #17637 | 22 Across | 2025-06-10 flower