What does the cryptic crossword clue "Showy plant is fancily set in patio (10)" mean?

The wordplay uses an anagram. anagram of SET + IN + PATIO = POINSETTIA The answer is POINSETTIA.

Showy plant is fancily set in patio (10)

Daily Mail Cryptic #16972 | 25 Across | 2022-11-21 flower