How many letters does the top answer for “a coming to an end of a contract period” have?

The most common answer is expiration (10 letters).

Crossword clue: a coming to an end of a contract period

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

expiration 10 letters wn-def

a coming to an end of a contract period

termination 11 letters wn-def

a coming to an end of a contract period

coming to an end 50% similar → terminative