How many letters does the top answer for “home of sirkeci railway station” have?

The most common answer is fatih (5 letters).

Crossword clue: home of sirkeci railway station

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

fatih 5 letters wd-fact-v3

istanbulprovince 16 letters wd-fact-v3

home of ankara railway station 60% similar → ankaraprovince

home of baltiysky railway station 60% similar → saintpetersburg

home of varshavsky railway station 60% similar → saintpetersburg