Post office activity, or a hint to this puzzle's theme

Question:

Answer:

LETTERSORTING

Length:

Similar Crossword Questions:

Office building problem that's a hint to this puzzle's theme entries (see their last three letters)
Angle (and a three-word hint to this puzzle's theme)
It starts at a plate (and a hint to this puzzle's theme)
Internet letters, and a hint to this puzzle's theme
Handle user, and a hint to this puzzle's theme
Common refrain that's a hint to this puzzle's theme
Antelope with spiraled horns (and a hint to this puzzle's theme)
Duo with the 1985 hit "Shout" (and a hint to this puzzle's theme)
Delightful, and a hint to this puzzle's theme
Molecule that sends amino acids to ribosomes ... and a hint to the theme of this puzzle
Hilarious ... or a hint to this puzzle's theme
Uncredited actors, and a hint to this puzzle's theme
Look for bargains (and a hint that explains this puzzle's theme)
___ change (or a hint to the puzzle theme)
Fill in the ___ (a hint to this puzzle's theme)
Nancy Reagan's antidrug slogan, and a hint to this puzzle's theme
Advice to the rash, and a hint to this puzzle's theme
Gets past a last difficulty ... or a hint to this puzzle's theme
First name of a civil rights activist who would turn 85 today, and whose adopted last name is a hint to this puzzle's theme
1997 Kevin Spacey film, and a hint to this puzzle's theme
"That's final!" (and a hint to this puzzle's theme)
Grammy-winning Nelly Furtado song . . . or a hint to the puzzle theme
Tyro, and a hint to this puzzle's theme
Subject of the Final Jeopardy! question that knocked out Ken Jennings after a record 74 wins ... or a hint to this puzzle's theme
"The wart stops here" product, and a hint to the theme found in eight puzzle answers