How many letters does the top answer for “landmark in london” have?

The most common answer is johnlewis (9 letters).

Crossword clue: landmark in london

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

johnlewis 9 letters wd-fact-v3

thecrystalpalace 16 letters wd-fact-v3

landmark in city of london 67% similar → barbicanestate, guildhall, lloydsbuilding

landmark in london borough of brent 50% similar → wembleyarena, wembleystadium

landmark in london borough of camden 50% similar → bttower, charlesdickensmuseum, kenwoodhouse