What does the cryptic crossword clue "Inferior brought back tied up when Conservatory finally ruled out (3)" mean?

The definition is "Inferior". The wordplay uses a reversal. BUS (reversal="BUS") = SUB; definition: "Inferior" The answer is SUB.

Inferior brought back tied up when Conservatory finally ruled out (3)

Independent Cryptic #11867 | 17 Down | 2024-10-22 flower