What does the cryptic crossword clue "Crook did try and go for treatment (8)" mean?

The wordplay uses an anagram. anagram of DIDTRYGO ("did try and go") [anagram: "treatment"] = DIRTYDOG The answer is DIRTYDOG.

Crook did try and go for treatment (8)

Independent Cryptic #1821 | 11 Across | 2025-01-19 flower