What does the cryptic crossword clue "Entire EP remixed — it's an evergreen (4,4)" mean?

The definition is "an evergreen". The wordplay uses an anagram. anagram of ENTIRE + EP = PINETREE; definition: "an evergreen" The answer is PINETREE.

Entire EP remixed — it's an evergreen (4,4)

Guardian Cryptic #28898 | 26 Across | 2022-10-26 flower