What does the cryptic crossword clue "Rumour I ignored — it’s not sweet (4)" mean?

The definition is "it’s not sweet". The wordplay uses a deletion. BRUT (deletion) = BRUT; definition: "— it's not sweet" The answer is BRUT.

Rumour I ignored — it’s not sweet (4)

Guardian Cryptic #29095 | 15 Across | 2023-06-13 flower