How many letters does the top answer for “someone who is unimportant but cheeky and presumptuous” have?

The most common answer is jackanapes (10 letters).

Crossword clue: someone who is unimportant but cheeky and presumptuous

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

jackanapes 10 letters wn-def

someone who is unimportant but cheeky and presumptuous

whippersnapper 14 letters wn-def

someone who is unimportant but cheeky and presumptuous