What does the cryptic crossword clue "Primate's rear - it's revolting (7)" mean?

The definition is "Primate's". The wordplay uses an anagram. anagram of REAR + IT'S = TARSIER; definition: "Primate's" The answer is TARSIER.

Primate's rear - it's revolting (7)

Independent Cryptic #11799 | 19 Across | 2024-08-03 flower