How many letters does the top answer for “a disavowal or taking back of a previous assertion” have?

The most common answer is abjuration (10 letters).

Crossword clue: a disavowal or taking back of a previous assertion

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

abjuration 10 letters wn-def

a disavowal or taking back of a previous assertion

recantation 11 letters wn-def

a disavowal or taking back of a previous assertion