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"upset" is also used as a crossword clue. If that's what you saw, the answer is often distressed (10 letters).
Definitions
an improbable and unexpected victory
Word origin
From Middle English upset (“the act of setting up; establishment”), from Middle English upsetten, corresponding to up- + set. Cognate with Middle Low German upset (“setup; arrangement”).
Used in a sentence
“He was upset when she refused his friendship.”
“My children often get upset with their classmates.”
“His stomach was upset, so he didn't want to move.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Surprise win”5 letters
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