How many letters does the top answer for “a pernicious and malign influence that is hard to get rid of” have?

The most common answer is canker (6 letters).

Crossword clue: a pernicious and malign influence that is hard to get rid of

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

canker 6 letters wn-def

a pernicious and malign influence that is hard to get rid of

pestilence 10 letters wn-def

a pernicious and malign influence that is hard to get rid of