Crossword clue: a plant of the genus verbascum (v. thapsus); the common mullein.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
A plant of the genus Verbascum (V. Thapsus); the common mullein. [Also high-taper and hag-taper.]