How many letters does the top answer for “act of taking the place of another especially using underhanded tactics” have?

The most common answer is displacement (12 letters).

Crossword clue: act of taking the place of another especially using underhanded tactics

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

displacement 12 letters wn-def

act of taking the place of another especially using underhanded tactics

supplanting 11 letters wn-def

act of taking the place of another especially using underhanded tactics