What does the cryptic crossword clue "Wax modeller needing uniform as dust resettles (7)" mean?

The definition is "Wax modeller". The wordplay uses an anagram. anagram of U AS DUST = TUSSAUD; definition: "Wax modeller" The answer is TUSSAUD.

Wax modeller needing uniform as dust resettles (7)

Guardian Cryptic #29142 | 14 Across | 2023-08-07 flower