What does the cryptic crossword clue "Thread poet developed for very confidential informant (4,6)" mean?

The definition is "informant". The wordplay uses an anagram. anagram of THREAD + POET = DEEPTHROAT; definition: "informant" The answer is DEEPTHROAT.

Thread poet developed for very confidential informant (4,6)

Daily Mail Cryptic #17518 | 13 Across | 2024-12-25 flower