How many letters does the top answer for “feeling or showing little interest or enthusiasm” have?

The most common answer is halfhearted (11 letters).

Crossword clue: feeling or showing little interest or enthusiasm

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

halfhearted 11 letters wn-def

feeling or showing little interest or enthusiasm

lukewarm 8 letters wn-def

feeling or showing little interest or enthusiasm

tepid 5 letters wn-def

feeling or showing little interest or enthusiasm