How many letters does the top answer for “one fond of good living; an epicure. sir w. scott.” have?

The most common answer is gastronome (10 letters).

Crossword clue: one fond of good living; an epicure. sir w. scott.

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

gastronome 10 letters web-def

a person devoted to refined sensuous enjoyment (especially good food and drink)

gastronomer 11 letters web-def

a person devoted to refined sensuous enjoyment (especially good food and drink)