What does the cryptic crossword clue "In which one regards blossoms (10)" mean?

The definition is "In which". The wordplay uses an anagram. anagram of ONE + REGARDS = ROSEGARDEN; definition: "In which" The answer is ROSEGARDEN.

In which one regards blossoms (10)

Independent Cryptic #11845 | 8 Down | 2024-09-26 flower