How many letters does the top answer for “one who, or that which, roots; one that tears up by the roots.” have?

The most common answer is rooter (6 letters).

Crossword clue: one who, or that which, roots; one that tears up by the roots.

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

rooter 6 letters web-def

an enthusiastic devotee of sports