How many letters does the top answer for “having self-possession upset; thrown into confusion” have?

The most common answer is discombobulated (15 letters).

Crossword clue: having self-possession upset; thrown into confusion

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

discombobulated 15 letters wn-def

having self-possession upset; thrown into confusion

disconcerted 12 letters wn-def

having self-possession upset; thrown into confusion