How many letters does the top answer for “a young codfish, especially when cut open on the back and dressed.” have?

The most common answer is scrod (5 letters).

Crossword clue: a young codfish, especially when cut open on the back and dressed.

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

scrod 5 letters web-def

young Atlantic cod or haddock especially one split and boned for cooking

scrode 6 letters web-def

A young codfish, especially when cut open on the back and dressed. [Written also escrod.] [Local, U.S.]