Crossword Puzzle Underworld groups

Clue: Underworld groups

Groups transported to underworld meetings? (DONCARLOADS with 11 letters)
Sprig of mistletoe that served Aeneas as a pass to the underworld (GOLDENBOUGH with 11 letters)
Underworld deity (OSIRIS with 6 letters)
Traffic groups (DROVESOFMOTORISTS with 17 letters)
Lawmaking groups (SENATES with 7 letters)
One of its groups is rec.puzzles (USENET with 6 letters)
Trained groups (CADRES with 6 letters)
Like some groups or humor (ETHNIC with 6 letters)
Large chamber groups (NONETS with 6 letters)
Groups of linked convicts (CHAINGANGS with 10 letters)