How many letters does the top answer for “the condition of not containing or being covered by a liquid (especially water)” have?

The most common answer is dryness (7 letters).

Crossword clue: the condition of not containing or being covered by a liquid (especially water)

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

dryness 7 letters wn-def

the condition of not containing or being covered by a liquid (especially water)

waterlessness 13 letters wn-def

the condition of not containing or being covered by a liquid (especially water)