How many letters does the top answer for “city in transvaal province” have?

The most common answer is johannesburg (12 letters).

Crossword clue: city in transvaal province

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

johannesburg 12 letters wd-fact-v3

city in the northeastern part of South Africa near Pretoria; commercial center for diamond and gold industries

city in adana province 50% similar → ceyhan, kozan

city in antalya province 50% similar → perge

city in ararat province 50% similar → dvin

city in arauco province 50% similar → canete, curanilahue

city in arkhangai province 50% similar → tsetserleg

city in artemisa province 50% similar → alquizar, bahiahonda, bauta

city in badakhshan province 50% similar → fayzabad

city in balkan province 50% similar → balkanabat