What does the cryptic crossword clue "Private Eye unravels hustle (6)" mean?

The definition is "Private Eye". The wordplay uses an anagram. anagram of HUSTLE = SLEUTH; definition: "Private Eye" The answer is SLEUTH.

Private Eye unravels hustle (6)

Daily Mail Cryptic #16384 | 30 Across | 2020-08-19 flower