What does the cryptic crossword clue "Produced a low, sullen feeling, we hear (5)" mean?

The definition is "Produced a low". The wordplay uses a homophone (sounds like). sounds like “MOOD”. The answer is MOOED.

Produced a low, sullen feeling, we hear (5)

Times Cryptic #28599 | 6 Across | 2023-05-10 flower