How many letters does the top answer for “a complex carbohydrate found in many plants and used as a sweetening agent” have?

The most common answer is saccharose (10 letters).

Crossword clue: a complex carbohydrate found in many plants and used as a sweetening agent

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

saccharose 10 letters wn-def

a complex carbohydrate found in many plants and used as a sweetening agent

sucrose 7 letters wn-def

a complex carbohydrate found in many plants and used as a sweetening agent