What does the cryptic crossword clue "He was a Dutch painter? Utter nonsense (5)" mean?

The definition is "He was a Dutch painter". The wordplay uses a homophone (sounds like). homophone of BOSH(nonsense) The answer is BOSCH.

He was a Dutch painter? Utter nonsense (5)

Times Cryptic #28852 | 22 Down | 2024-02-29 flower