What does the cryptic crossword clue "Particular case with pile for sorting (8)" mean?

The definition is "Particular". The wordplay uses an anagram. anagram of CASE + PILE = ESPECIAL; definition: "Particular" The answer is ESPECIAL.

Particular case with pile for sorting (8)

Guardian Cryptic #29365 | 20 Across | 2024-04-24 flower