How many letters does the top answer for “heat food in order to kill harmful microorganisms” have?

The most common answer is pasteurise (10 letters).

Crossword clue: heat food in order to kill harmful microorganisms

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

pasteurise 10 letters wn-def

heat food in order to kill harmful microorganisms

pasteurize 10 letters wn-def

heat food in order to kill harmful microorganisms