Crossword Puzzle Work at the post office

Clue: Work at the post office

Post office worker? (EDITOR with 6 letters)
Post office workers, for short? (EDS with 3 letters)
Post office workers? (NEWSMEN with 7 letters)
Post-office worker (e.g. CARRIER with 7 letters)
Post office activity, or a hint to this puzzle's theme (LETTERSORTING with 13 letters)
Some post office workers (e.g. MAILMEN with 7 letters)
Post office workers (MAILMEN with 7 letters)
Do some post office work (SORT with 4 letters)
Work at the post office, in a way (SORT with 4 letters)
Did post office work (SORTED with 6 letters)