What does the cryptic crossword clue "A person is upset to see slander (9)" mean?

The definition is "slander". The wordplay uses an anagram. anagram of A + PERSON + IS = ASPERSION; definition: "slander" The answer is ASPERSION.

A person is upset to see slander (9)

Times Cryptic #28734 | 19 Across | 2023-10-14 flower