How many letters does the top answer for “which of these is not a disney cartoon character” have?

The most common answer is daffy (5 letters).

Crossword clue: which of these is not a disney cartoon character

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

daffy 5 letters otdb

duck 4 letters otdb

to move (the head or body) quickly downwards or away