How many letters does the top answer for “someone trained in forestry” have?

The most common answer is arboriculturist (15 letters).

Crossword clue: someone trained in forestry

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

arboriculturist 15 letters wn-def

someone trained in forestry

forester 8 letters wn-def

someone trained in forestry

someone who is being trained 50% similar → trainee