What does the cryptic crossword clue "Primate dropping ecstasy in drink (5)" mean?

The definition is "Primate". The wordplay uses a charade (building blocks). ORANG (deletion) = ORANG; definition: "Primate" The answer is ORANG.

Primate dropping ecstasy in drink (5)

Guardian Cryptic #29157 | 28 Across | 2023-08-24 flower