What does the cryptic crossword clue "Hear lot is messed up in squalid room (7)" mean?

The definition is "squalid room". The wordplay uses an anagram. anagram of HEAR + LOT = RATHOLE; definition: "squalid room" The answer is RATHOLE.

Hear lot is messed up in squalid room (7)

Daily Mail Cryptic #17130 | 10 Across | 2023-06-29 flower