How many letters does the top answer for “a workman who lays and repairs railroad tracks” have?

The most common answer is platelayer (10 letters).

Crossword clue: a workman who lays and repairs railroad tracks

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

platelayer 10 letters wn-def

a workman who lays and repairs railroad tracks

tracklayer 10 letters wn-def

a workman who lays and repairs railroad tracks