Distressing letters found 9 times in this puzzle

Question:

Answer:

SOS

Length:

Similar Crossword Questions:

Second of a pair of letters swapped six times in this puzzle's theme entries
First of a pair of letters swapped six times in this puzzle's theme entries
String of letters found in this puzzle's longest Across answers
It ends with something found four times in this puzzle
Perjure oneself ... or what can be found six times in this puzzle
City whose language uses only the 12 letters found in this puzzle
Classic Dickens title (from whose 10 letters this puzzle was constructed)
Piece of work found in this puzzle's longer entries
Creature suggested by this puzzle's circled letters
Second letters of this puzzle's five theme answers (seen in order)
"Dough" found in this puzzle's four longest answers
Using both sides with equal frequency (like the letters in this puzzle's answer grid?)
One more than the number of different letters in this puzzle
Sign of spring, hidden four times in this puzzle
Things found in this puzzle's eight longest answers
Party snack (and a hint to this puzzle's circled letters)
Tip, and a hint to this puzzle's theme found in five answers
Wintry mix revealed in the circled letters (it's the puzzle theme!)
River phenomena (or what literally happens six times in this puzzle)
Commerce minder found in eight of this puzzle's longest answers
Period that ends Nov. 3rd, requiring a shift, and letters that shift in this puzzle's theme entries
Weather comment represented visually by this puzzle's circled letters
Exhibit found in this puzzle's four longest answers
Regular stuff found inside this puzzle's three longest answers
Enclosure ... and an alphabetical listing of letters not appearing elsewhere in this puzzle's answer