Crossword Puzzle Bustles of activity

Clue: Bustles of activity

Protest activity for ANWR drilling proponents against EPA officials? (SNOWBALLING with 11 letters)
Office activity (FAXING with 6 letters)
Post office activity, or a hint to this puzzle's theme (LETTERSORTING with 13 letters)
Expulsion from office (OUSTER with 6 letters)
Petruchio's activity (TAMING with 6 letters)
Office helper (e.g. AIDE with 4 letters)
Activity with a list (SCAVENGERHUNT with 13 letters)
Vocal offerings (ARIAS with 5 letters)
Box office purchases, informally (TIX with 3 letters)
Quebec's official flower (e.g. LYSBLANC with 8 letters)