Crossword Puzzle Tribal groups

Clue: Tribal groups

Tribal knowledge (LORE with 4 letters)
Fits into groups (ASSORTS with 7 letters)
Retiring groups? (PITCREWS with 8 letters)
Second of two groups that may come in handy for this puzzle? (THEPLATTERS with 11 letters)
Groups related by blood (CLANS with 5 letters)
Elephant groups (HERDS with 5 letters)
School groups: Abbr. (PTAS with 4 letters)
Groups hired for high-profile cases (LEGALTEAMS with 10 letters)
Groups of nine shorthand pros? (STENONONETS with 11 letters)
Hindu social groups (CASTES with 6 letters)